The doctor's clinic is closed on weekends?

Well, pretty much I wanted to go to the doctor's place to be prescribed some anti-anexity drugs for fight I am going on next Monday. But I have just been informed that the doctor's place is closed Sat+Sun which is... annoying to say the least. I was wondering if there are any other drugs which i can get over-the-counter from a pharmacist which do the same thing. Or if there are any other ways of being prescribed these partucular kinds of tablets, thanks.