If you feel like St John’s Wort is not enough I would recommend Zoloft. It is one of the most widely prescribed SSRI’s on the market. Just don’t take it with St John’s Wort. Unfortunately like any supplement they are not regulated and you have no idea what is in the bottle.
I was taking 100mg of Zoloft for years and cut back to 50 mg with no side effects whatsoever.
You might want to try Wellbutrin with Zoloft. They are very complimentary. They call the two Welloft.
Good luck to you.