Boy you sound exactly like me. My problem started 2 weeks ago. At first my doctor only prescribed nasel spray and decongestant. I went back a week later with more symptoms and she said it was an infection and prescribed an antibiotic along with the other two. 4 days later I was still in misery and I called her. She said sinus infections take a long time to go away. The antibiotic is for a full 2 weeks. I am on day 6 of the antibiotic. Still in pain though not "quite" as bad.
I did a search for sinus infections on the internet and unfortunately found out that acute sinus infections can last for 8 weeks.
The only good thing about it is that I haven't had an appetite and have lost about 10 lbs.
I did a search for sinus infections on the internet and unfortunately found out that acute sinus infections can last for 8 weeks.
The only good thing about it is that I haven't had an appetite and have lost about 10 lbs.

I now take Allegra-D most days and supplement that with Flonase Nasal Spray. To tell you the truth, I was really relieved it was a sinus infection and not my teeth since I had major bridgework done and thought it was all going to fall out!! 
I am really prone to getting severe sinus infections. I find that Aleve cold and sinus is the best. It does not make me tired. I have tried all the over the counter meds out there and this one does the trick. If the levaquin hasn't made a difference I would call your doctor and tell him, that is a strong antibiotic, and should have shown you a difference within 48 hours. Good Luck!!