In my experience the A & P is more like seeing vibrations with fast noticing/feelings of hope/the brain feeling like it can't contain it. The dark night is less like depression and more like a disenchantment with what you liked before. This would be specific in that there was some pain you were ignoring that you now see clearly. Also during this period it's common to not want to do anything but not really out of depression but more out of not wanting to feel the pain. Equanimity is a little like getting your head above water but it's more like a new found resiliency with stress plus a much more quiet mind. This was amazing when it first happened but it was quite narrow and more like a concentration attainment and then I fell into reobservation before the equanimity became a more stable habit. You have to keep practising and getting used to the withdrawal symptoms to have a more stable equanimity.
This is time where you want to see more detail of emptiness and use that equanimity on as many aspects of your experience as you can.
Time and the emptiness of timeWhat your brain is reacting to emotionally is experiences that go into the past practically instantly. The present moment is short-term memory. Ruminating/Clinging on life situations that instantly go into the past should seem less and less necessary as you pay attention to how fast impermanence is. It would be good when you get in a bad mood to ask the question "Why?" as if you're asking why the brain is wasting the present moment with negative narratives and just interrupt it. When you hit equanimity it will be even easier to do this. Interrupt it with "why?" and return to your body. Do it over and over again if you need to so that you can deal with the mental habits. Eventually asking why won't be necessary as your brain will learn to go to the answer (your body) right when you see the mind has wandered.