Glad to hear the 5-HTP is helping! GABA is not the safest substance around.

Since you are so sensitive to substances, you might get more relief from the St. John's Wort than others report. Be sure to get a product that is made with standardized extracts (probably easier where you live than here in the USA).

It is possible for you to have side effects even with herbal products. They are still medicines. So if you decide to try it, use caution and stop right away if it doesn't feel right.