Indygirl, I'm sorry to hear about all the trouble you're having, but thank you for sharing your problems here! I have chronic sinus issues, but thankfully have never been prescribed levaquin, though now I know not to take it!
My sinuses are really small, and I have allergies, which get me all plugged up, and then infections start, it's just terrible. Someone from my church recently told me about this nasal spray she found at the health food store, Nutrabiotic Nasal Spray
. It's got grapefruit seed extract in it, which is a natural antibiotic.
Anyway, I love this stuff! I was on an antibiotic that just did not kill the infection I had, and was about to go back to the doctor for a stronger one, but was resisting because I really don't like taking too many antibiotics. That nasal spray helped so much, and all the infection was killed off in about a week. It was awesome.
I know you've got issues with sinus drainage, but wanted to tell you about the nutrabiotic spray. Maybe it could help?