I have countless symptoms

It's not rare abroad (e.g. in central and east Europe, there are still new cases, each year. There, it's pretty normal. In Slovakia, for example...). Where was the tick from? Ticks are famous for a brain infection but not only that (not each one tick is infected, just some 2-10% of them can spread it and even if are infected then you don't have to get it) which can eventually kill or make some damages before when you get rid of but you had been cured in a hospital, so... Ticks can also spread infections from human/animal to human (with the blood... almost anything).

Something to read about Tick-borne encephalitis, Lyme disease, Anaplasmosis, Ehrlichiosis, etc...