Lol, i think ive dealt with every "systemic" inflammatory type symptom possible, caused by reactions to virtually anything you can imagine. My immune system is out of control, thats my primary problem. Im a bad lyme/mercury victim still in treatment.
Theres ALOT of different ways that can manifest itself. My ex-girlfriend used to get symptoms very similar to yours from eating yogurts cultured with a certain bacteria. She dealt with it for years clueless to the correlation until i pointed it out shortly after we met.
Use your imagine as to what can cause things like that to happen, you could tell me anything in a case like yours at this point and i wouldnt be surprised. If something like that is happeneing with you, it sounds like its pretty consistent, so it seems that could be caused by a bug (theyre pretty much always there) or maybe some physiological process is pushing your immune system in that direction.
If i were you, i would put some effort into looking for bugs and would consider the possibilty of a hypersensitivity to anything that doesnt have your dna.
Ive had crp and sed rate done several times in the past to try to make sense of it, only a few times were either one elevated. I'll put some thought into what other possible markers you could look for, its been a while since i put any thought or effort in that direction.
Also, there were periods, depending on where my immune system was at and what i was sensitive to, where my symptoms were dramatically elevated at night. It was like they were on a schedule even. I figured that was due to diurnal hormone changes.
The closest thing ive found in effectiveness and similarity to mb12 is really freakin cold showers, or sometimes nsaids. Next best would be a whole arsenal of supplemental/herbal anti-inflammatories, ie fish oil, pure egcg, buhner herbs etc. Nothing has been consistent across the board, it varies depending... Nothing has been as bad@#$ as high dose mb12 for alot of things though.
If this idea turns out to have legs, you might want to check out Dr. Ty Vincents work developing low dose immunotherapy (ldi). An alternative doc from pennsylvania with a radio show had him on last year and what theyre discovering as far as loss of tolerance and related problems is pretty astounding. I recommend giving it a listen anyways.