I have only neuro signs too, and doc thinks Lyme, Bart and Babs. Last week I got a rash on both hands and called my LLMD. He took me off the doxy and switched it to Omnicef. . I am also on azithromycin and Mepron.
3 days after I started on Omnicef I got a real increase in the vertigo/balance, tinnitus, and slurring speech so bad it sounded like I had a stroke. I waited it out and today it's manageable. definitely keep a diary so you can see patterns - that's really key!
If that pressure doesn't subside, call your doc...
Keep your chin up and keep me posted cause it sounds like we are in very similar boats!
Good luck