How long have you been in treatment for? I was scared to go on Flagyl too. I kept waiting for OMG - ther herx of all herxes and it never happened. For me it took a month to know that whatever I had it was infectious b/c the doxy was helping and then after that I went 1.5 months just on doxy before starting treatment and was getting more and more sick.
After starting with the LLMD - not much change and then about 6 weeks in I started feeling much much better. I thought it was in my head that I looked yellow but that same week that I noticed a difference I had so many people coming up to me at work and saying "Hey, you've got some color in your cheeks - you are looking better." (At that point they knew I was ill).
For me in general - I have a herx, mild usually for a day or two and then I'm fine. Its not like a lot of people on here. My dr said some people don't herx at all.