It may just be a case of too much too soon if you know what I mean. Maybe just trying to incorporate one new food each week. What if you try eating your safe foods and then incorporate one new food and see how that goes for the week. Then if it is ok the next week you can continue eating your safe foods and try another one and see what happens. I think that is the easiest way to tell what's affecting you food wise. I don't have IBS but I do have UC and although I'm stable on meds I still have foods that don't agree with me. I can't comment on the tea b/c I've never tried ginger tea but I herbal tea doesn't agree with me.