Well, I certainly don't want to say that you aren't healed - you've said that you feel great - but it should give you pause and reason to reflect for a few moments to make sure that your sure. I find myself questioning my healing frequently as well right now because I surely don't want to be 'caught flat footed' - if you know what I mean. I want to be as proactive as I reasonably can.
I think I would sit down and write a list on each and every supplement that made me have herx-type reactions and investigate each one. What do they do in the body? What actions do they have - then find the common denominators. It will at least give you direction, I would think.
Let's say that the one thing they all do is support the immune system- then it's possible that your immune system needs more help in keeping Lyme at a tolerable level - so if you purposely set out to build up your immune system, then it won't have to work so hard to keep Lyme in check.
I hope that makes sense to someone other than me!