I have had an extremely stubborn sinus/respiratory infection for ...

I have had an extremely stubborn sinus/respiratory infection for around 12 weeks or so. Weeks ago I finished a round of antibiotics (Doxycycline (sp?)) without much improvement. Went to ENT and he prescribed Levaquin 500mg once daily for 21 days. I have been on this med for about 14 or 15 days. Sinuses are some better but I don't think it is all gone. Interestingly though, about 3 or 4 days ago ALL of my joints began hurting...all of a sudden. I have had a really sore shoulder for about a week, maybe more, that really isn't getting better. How bizarre that this is the site I found. It must be the meds. It is Friday 11/30, 5:15, of course so I can't call them now. I have an appointment on Tuesday and I will assertively and aggressively inquire about this. This is pretty scary. If I learn something new I will gladly post it here--but I truly expect to be told it is not the Levaquin...