Sinus infection! Help!! 😩😩

Any else have a sinus infection while pregnant? I feel like I’m dying…. 36+ weeks. I can’t sleep anyways because I am uncomfortable and now I can’t breathe either. My head feels like someone stabbed me with a bunch of knives. I’ve taken Tylenol, Robitussin, Zyrtec, and my OB finally prescribed me amoxicillin but it isn’t working. (Obviously haven’t taken all of those at the same time). I have also been doing a sinus rinse as well. Any other suggestions or advice? Thanks I’m advance!