Even with negative tests, keep them treating you. This is lyme until somebody finds some better diagnosis which responds to treatment as well as you respond to antibiotics. I was sick for 15 years before I was diagnosed. It took one year of antibiotics, but I am better, and I am living a full life. I'd forgotten what that looked like.

I suggest the lymenet.org board to find a lyme literate doctor near you, if you are having problems. And in the US, bloods sent to a lab specializing in tick borne disease. And don't forget they must test for those co-infections...

Just advocate for yourself...you're on the right track.