I had a severe sinus infection when I was prg with DS1. We did the whole 'we won't give you anything, it will pass and you're pregnant' thing for about a week but after being awake for 3 days straight because I couldn't sleep with the pain, they finally gave me some antibiotics and within 3 days I was fine. I really recommend you go back and see your doctor. There has to be something they can give you.