My last interaction with the German medical system was about lyme. The doctor I consulted didn't think it was lyme at first (apparently, the rash isn't always circular and it doesn't always move). If you know you have been bitten by a tick and later you get an unexpected rash (significantly more than usual), go see a doctor (or two, as I learned).

Also: Amoxicillin is better than its reputation. Three doctors might literally recommend four different antibiotic dosages and schedules. Double-check everything; your doctor might be at the end of a 12-hour shift and is just as human as you. Lyme is very common and best treated early.

Edit: Fixed formating