I can't answer about the Milk Thistle but I can say WOOHOO Anne! Castor Oil packs, CEs, Echinacea, garlic and Cayenne and best of all, no alcohol in over a month? WOW that is fantastic girl!!!!
I've been thinking about the IF#1 situation for you. Why don't you look on MRH for all the ingredients for the IF#1, buy the smallest quantity which I think is 4oz. and then test a small amount of them one at a time. That way you could see which one is bothering you, and it won't be expensive in that small size.
Also, I really do think that EFT would help you to get through this reaction issue!
Anne it sounds like you're doing better honey. I think that you'll be good taking baby steps like you're doing now. Sometimes slow and steady wins the race ya know?