My side effects that I think are attributable to Levofloxacin: E...

My side effects that I think are attributable to Levofloxacin: Exacerbated rib cage pain (I have been coughing some, but not enough for this much pain); general weak feeling, and weird feeling (not terrible, but not good); pounding head whenever I mover faster than a sloth; and bizarre dreams or thoughts at night (again, not terrible, but new to me).... I have taken this drug for four days, on a perscription for a bad sinus infection. I have had other antibiotics before - this one is definitely causing some problems.