What should I do?

Okay so I know you ladies aren't all health care professionals, but this isn't a life or death situation for me or my child. I'm just looking for some opinions. I have a sinus infection and am feeling pretty miserable. Usually when I come down with a cold or anything like this I kick it on my own, but I'm 36 weeks today and being sick miserable on top of being pregnant miserable is definitely kicking my behind. I have my next doctor's appointment Thursday. My question is, should I ride it out until Thursday (I don't even know if I would be able to take anything to help it or not) or should I go see a doctor today? Thanks for your input ladies :)