Hi Jeff,
I'm going through a similar thing (lots of energy phenomena, which sometimes seems overbearing and causes panic, not unlike past psychedelic experiences). I'm still cracking the nut myself, but here are some observations and materials that have been helpful for me and hopefully for you too. (In the following I'll just describe my situation, assuming it's similar to yours, with the understanding that there may be important differences.)
The fundamental problem goes like this. There comes a moment when a surge of energy, and/or a spontaneous, subtle but unmistakable shift in perceptual experience arises. At this moment, a conceptual
doubt arises: something like "uh oh, this is bad" or "I am not going to be able to handle this." This doubt causes resistance to the still-intensifying experience. This resistance causes panic and suffering.
If you accept that something like this train of events is what happens, perhaps you notice that there are multiple levels at which the situation can be addressed.
1.
dissolve the conceptual belief underlying the doubt. The whole problem starts because of an underlying belief that something is going wrong or that you won't be able to handle it. Implicitly or explicitly, you believe that something bad is about to happen and you'd better resist it or else things will really turn out poorly. But is that belief correct?
You should try to rationally review your own experiences and the experiences of people with similar experiences, both for practice-induced energy phenomena and for panic attacks. What you will find is that although the experience itself is intense, in the end it's safe. It is subjectively wild but objectively perhaps not much more than an arousal of your sympathetic nervous system, not unlike what you experience during moments of stress or during moderate exercise.
You should know this not just in an abstract, discursive sense, but in a really believed, digested, felt-in-the-bones sense. Remind yourself of this, research it, thoroughly convince yourself of it. You are going to be okay when this stuff happens.
2.
dwell in equanimity. What causes the suffering is resistance to the experience. One way to address that is to work on the belief fueling that resistance, to weaken it or prevent it from occurring in the first place. But if the urge to resist arises anyway, do your best to exercise equanimity.
That is, rather than getting your hands dirty trying to direct the flow of experience here or there, assume a radically hands-off, radically non-interfering disposition. Observe the experience as it comes, changes, and goes, without engaging it. Let it wash through; from your research, you already know it's going to harmlessly wash through on its own anyway.
At the most basic level, this applies to the experience of energetic phenomena, but in a more sophisticated way you could also apply this approach to whatever bodily feelings and internal, mental images and speech might be going on that convey to you the sense of fear and wanting to intervene. Don't let these experiences be your "base of operation", but rather, be equanimous about them too; observe them as just so much more sensations coming and going.
3.
short-circuit the problem while it's small, instead of allowing it to get out of control. This is key. If you are like me, there is a clear moment during which you are evaluating your energetic experience (e.g. "uh oh, here it comes") but before which you have really got yourself in a bad way. What you do in the next few moments is pivotal. If you react poorly, then the thing can get really out of control and difficult to deal with. But if you react well, you can easily handle it and have a smooth (even euphoric) ride.
When you first feel that energy coming on, make a point of it to remain in complete equanimity during those next crucial moments. Let whatever happens, happen, without interfering at all. You may find that things go a
lot smoother than you thought they would.
It's kind of like the onset of the energy phenomena is like the lighting of a match. You notice the small flame and see that you have a situation on your hands. You might think the match is dangerous (fear), so you should try to put it out (resistance). You pour water all over it, but turns out that the water was gasoline, and you've got a huge fire on your hands (suffering). This is what happens when fear the experience and thus try to resist it. You just make it worse.
Conversely, what you can do is notice the match is lit, but just check out how it sparkles without so much as breathing on it. You are okay with this because you know the match is just going to burn out harmlessly. If you feel the urge to put it out, just sit back and check out that urge too. Consider it to be an object alongside the match, rather than something internal that is guiding your actions. The match, left to its own devices, will eventually burn out harmlessly. (Or, maybe it will light up a pleasant fireworks display for you.

)
The advice about equanimity (point 2) can be very difficult to apply in the heat of the moment, especially to your own evaluations, urges, and fears, and especially if you are already panicking. That's why it's important to exercise point 1 (to reduce spontaneous resistance) and point 3 (to nip the problem in the bud while it's still manageable). Really the fundamental point is to have equanimity (i.e. not to resist), because resistance is what causes all your problems in this scenario. But it helps to minimize the size of the problem that you have to remain equanimous about.
I like some of the stuff Shinzen Young has to say about equanimity. Maybe you'll find these helpful too.
general writing on equanimity and mindfulness
http://shinzen.org/Retreat%20Reading/artEquanimity.pdf
http://shinzen.org/Retreat%20Reading/What%20is%20Mindfulness.pdf
talk about ascetism, suffering, equanimity, and purification of consciousness (highly relevant!)
http://www.youtube.com/watch?v=1HPObyaLB68
http://www.youtube.com/watch?v=OsyekyUsImc