First things first. I would recomend contacting Tory2457. She is very knowledgable on Lyme, and infact has/had it. She has been to a Lyme Literate doctor as well, but again she has and knows so much about the very questions you ask, and she is very friendly and willing to help.
Also, I've had a very similar experience to yours with my "MS". I just recently had developed the "shocking" sensation that went to my legs when I bend my neck (L'hermittes sign). It is gone now.
I have had sinus problems for the last 4 - 5 years, but never before that. I have also had high liver enzymes, but for no explainable reason?????!!!! I had numbness through out my trunk, hands, and have had on my right foot. Right now I have no out right symptoms. I have been on and off of Rebif 44mcg. Right now the only thing I am treating my "MS" with is Minocycline (100mg Twice daily) and high dose Omega-3.
Just this last Sunday I had a severe sinus infection with fever, it came out of no where this time, and also affected my ears. I am better now, but this time I didn't have a relapse, or at least not yet. This year I have had two bouts, not including this last one, of sinus/ear infections and both times I had a relapse.
So I'll stop rambling on, but I can relate to your symptoms, and I am also curious about the high liver enzymes. This has been the case for me for the last four years (caught on tests not related to MS problems).