Why symptoms go up and down? Random tremoring?

Hi everyone,
Lately I've been starting to feel better, been up and moving more than I have in months, even made my own breakfast yesterday and today. My question is why do my symptoms go up and down (two steps forward, one step back), I understand this is the case with Lyme and co, but why is this? I'm not on antibiotics (treated/ing with rife and herbs). I know I'm not herxing every time my "bad" symptoms flare up and they are so random, for example I went to bed last night feeling pretty good and thinking I was on the way to healing only to awaken two hours later with bad neuro symptoms, went back to sleep and woke up ok this morning, but then symptoms started to come back. It's becoming a random pattern (because it occurs at different times) of a few decent hours, then some bad hours, decent hours, and so on.... Plus, During my "bad" times I've been noticing that I have a lot of random tremoring (I can actually see and feel it). These neuro flares can come on without warning, like yesterday I was in the shower when all of a sudden things sort of looked funny, my sense of equilibrium got worse than normal (my balance is terrible), and I felt so weak. I got out and went and sat down, I feel a bit better, but noticed the tremoring continued for about an hour, then lessened and went away.
Some ideas I have are that the toxins are recirculating, bacteria is flaring and of course a herx. I know from research this two step forward one step back is normal, I guess I just need some reassurance. Even though I know that lately the bad times are getting broken up by decent times, but every time my symptoms flare I worry I'm going back to being really ill.

Thanks for the words of wisdom. I'm really finding with this illness that when I'm feeling decent I forget what it's like when I'm feeling bad (ie. could it really have been all that bad, oh well never mind I'm on the mend), whereas when I'm feeling bad I forget how it feels to be ok (ie. this is terrible and I'm never going to get better). Such arollercoaster!