Hi Tom, Sounds like you’re working with major clearing issues. Keep in mind that this may be the lifetime you’ve chosen to take on this work. It’s crucial and you shouldn’t allow yourself to be overwhelmed. Your primary focus should be to be stabilized within the light, in the witness, unidentified with any lower self negativity that’s coming into view. From there, you open to the dark at your controlled pace to process it.
There are different Kundalini schools, so I don’t know what you did specifically, but it probably doesn’t matter. I don’t think you could do any real damage from just one session, whatever you did. You could have stirred up some negativity, as you say. So just back off and take it easy.
The basic idea behind Kundalini work is to raise the root chakra energy to the upper chakras. A nice way to incorporate this into your practice without going overboard is to just visualize and feel energy going up the middle of your spine as you inhale with the yoga breath; and down the front as you exhale, for maybe 10 breaths. Doing this regularly every day sets up the pattern in the subconscious, and over a period of time, it’s likely the energy will respond. I believe the kundalini energy is related if not identical to sexual energy, so your sexual needs may change as you practice over time. But be careful about trying to modify ordinary sexual release with celibacy, etc; especially with heavy issues as you mention, this is how you could get into trouble. Let the sexual expression modify itself slowly as you just stay with the breath repatterning exercise.