Hi José,
Welcome and thank you for sharing your story.
“Kundalini first” is not a good way to go with spiritual practices. Best to cultivate a foundation of abiding inner silence (samadhi) underneath first with long time daily meditation, like putting in the foundation before building a house. A house without a foundation will be unstable.
So what to do now since your kundalini has been prematurely active for some time? There are ways to make the journey easier, but it will take time. Not aggravating things further with more energy related techniques like kumbhaka, mudras, bandhas, etc. is the first thing. Plenty of “grounding” activity should be undertaken. Finding a stable daily meditation practice for putting in that foundation of inner silence is next. Meditation can be problematic with a surging kundalini, with more sensitivity when going deep in meditation, so you may need to test several approaches to find a stable meditation method that fits your need.
AYP has extensive coverage on these matters. Rather than repeating them all here, it is suggested to review previous discussions in this forum category with those having similar issues, covering remedial measures, corresponding lessons, etc. Below is one with detailed support. There are many other discussions here. The thing is, it is less about your specific symptoms and focusing on those (which can aggravate them) than finding overall balance between symptoms, grounding and a practice routine (meditation) so you can function better in daily activity and move ahead on your path with comfort and safety. It will take some time, and patience…
It is going to be alright.
The guru is in you.