...so sorry to read this and what you are going through; i think i got my tinnitus from meds and/or mris because when i used to get them, not that often, NO ear protection at all.... well last one I got I took my own insertable sponge ear plugs and they had some type of thick pads over both ears and the noise was considerably less and if i have any in future will make sure they know to do this again.... i have tinnitus, moderate hearing loss yet hyperacusis, musical ear (not fun) and eustachian tube problems ... so i can sympathize with your not wanting an mri... but they now seem to realize the damage such loud noise can cause in some people.. best of luck and as a p.s. my daughter was bitten by a tick which does not cause lyme but Powassan Virus and was from a ground hog.... if you want to check internet. ... and i think there are other types of ticks too.... dont want to worry you more but so many things it could be, hugs !!! J.