Hey man you feel better now?
excess of gaba as of any neurotransmitter can be quite dangerous. I would recommend that you stop experimenting with fields and go to the hospital, to the emergency room. and you will tell them that you mistakenly took a very high dose of the gaba supplement and they will know how to treat you better than us, here we do what we can to help but we are not doctors and bad advice in these delicate conditions could be very risky. I hope you get better.
After that, it would be a good idea to start restoring your mental health with the suggestions that @mauvaisgars says. Without medicines or hormones, most of the time the root of the problem is emotional or energetic. treating the symptoms alone does not solve anything in the long run.