Yes. Your inner ears play a very big role in your balance. I get ear infections quite a bit and fall all over the place when I do. I look like a drunk or something.
Any treatment that effects your ears, nose, throat, sinus ect is going have an effect on the others as well as they are all interconnected. (Even on your eyes in some cases.) I am a bit surprised however that he didn't give you some form of antibiotics.