Totally agree with everything Casey said. This whole thing about a toxic reaction meaning you are getting better always sounds suspicious to me. I have heard it quite a few times from naturopathic based health practitioners and also read it in books on alternative remedies and I don't find it to be true. When I did a detox a couple of years ago - which made no difference to my IBS, but did help with other issues - I actually worried because I didn't feel "worse" at all, only better! I think if something is hurting you, it probably isn't doing any good (with obvious exceptions like chemotherapy for cancer) and if something makes you feel better it probably is doing you good (with obvious exceptions like taking heroin). It is pretty disgusting that someone with medical qualifications would talk to you like that. You are much more of an expert on your own IBS than anyone else, whatever their qualifications, and I think any good doctor or nurse would acknowledge that.
Hope you are feeling better for stopping taking this stuff - and it's good that you told us about what happened - it will help other people to make their own decision about starting or stopping Reliv.