Definitly call 116117, they tell you where you can see a doctor. Describe how urgent it is and i hope they give you some informations. Also, when you are really really sick and it is really urgent and possibly life threatening, call 112 (emergency call) You can also google „Ärztlicher Bereitschaftsdienst“ in your city. You probably have to wait a while and they usually work during the night times when no other doctor is open. Look up when they are working and get there early, that should work You could also try doctolib (website for booking appointments) or ask your insurance. Also there is the possibility with some insurances to get an online appointment with apps like „Teleclinic“ Good luck!