Hey Andrea,
great advice above, I'm just gonna add a specific exercise from MCTB2 you can try in your practice, as it is specifically recommended to be tried during the dark night stages. Emphasis is on try. When in doubt, come back to the advice above.
"My favorite exercise for examining dukkha is to sit quietly in a quiet place with eyes closed and examine the physical sensations that make up any sort of desire, be it desire to get something (attraction), get away from something (aversion), or just check out or go to sleep (ignorance). At a rate of one to ten times per second, try to experience exactly how you know that you wish to do something other than simply face your current experience as it is. Moment to moment, try to discern every little uncomfortable shift, urge, impulse, and tension that prods your mind into fantasizing about the past or future or stopping the meditation entirely.
For that meditation period, they become my prey and nourishment, opportunities to understand something extraordinary about reality, and so I do my very best to let none of them arise and pass without clearly perceiving and acknowledging the basic sense of dissatisfaction in relation to them. So, for that period try to:
• turn on sensations of the desire to get results
• turn on the pain and unsettling sensations that make the mind shrink, reject, or contract
• turn on the boredom that is usually aversion to suffering in disguise
• turn on the sensations of restlessness that try to get you to stop meditating and do something, anything, else
• turn on anything with fear or judgment
• turn on any sensation that smacks of grandiosity or self-loathing
• turn on the things that typically derail meditation and make them into meditation objects
• turn on the sensations related to thinking about your meditation, which is generally aversion or attraction disguised by intellectual analysis. While there is value in meta-cognitive awareness, there is also great value in investigating the sensations that make up meta-cognitive awareness.
A half-hour to an hour of this sort of consistent investigation of dissatisfactoriness is also quite a workout, particularly as we spend most of our lives doing anything but looking at these sensations to gain insight from them. However, I have found that this kind of investigation pays off in ways I could never have imagined. Later, I will explain a stage called “the Knowledges of Suffering”, aka “the Dark Night”. If you find yourself having trouble with that phase of practice, come back here and try this exercise, as it can turn the tables on something that otherwise might turn the tables on you.
Exploring dissatisfactoriness may not sound as concrete as the first characteristic of momentariness or impermanence, but I assure you, it is. Even the most pleasant sensations have a tinge of misery to them, not only because they end, but also due to the strange way we hold our minds to create a sense of a stable self in a changing world, so look for it at the level of bare experience. Physical pain is a gold mine for this. I am absolutely not advocating cultivating or inducing pain, as there is already enough there. Just knowing in each instant how you know that pain is dissatisfactory and miserable can be profound practice. Don’t settle for just the knee jerk reaction, “of course pain is miserable!” Know exactly how you know this to be true in each moment, and don’t get lost in stories or interpretations about it. This is bare reality we’re talking about. Just be with it, engage with it, and know it at a very simple and straightforward sensate level."
As Bahiya Baby said, your system seems to be talented for this kind of practices; any progress you make here will be for great support of yourself (and perhaps others) in the future.