Ugghhh, sinus infections are awful. I never had one in my life until I had the triplets. Then in a year's time I had about 10 infections. Turns out they weren't really going away, so a smart doctor finally let me take the meds for 15 days instead of 10.
Anyway, I hope you're on antibiotics, and will be feeling better in a day or two. Have you tried a decongestant to reduce some of the pressure in your sinuses? And what about a warm towel put on your cheeks? That seems to help me sometimes, at least temporarily.