Again, Bugger. I hate that for ya' I know what it's like. :( It sucks.
What I've read if you don't mind, is that why pills or other things don't work on either you or me, is because something environmental or physical wise was applied to our blood stream for an extended amount of time and triggered the immune system to adapt to whatever it was in the blood stream and stopped responding to it.
Mine is hereditary. It's a mixed blessing though.
What do you do for stress relief?