I was expecting for my period last Nov. 20, 2007. I was taking Naproxen Sodium (Flanax 550mg per day), straight for 4days, one week prior to my expected date of period.

Im wondering if i'm pregnant because i'm now 3days delayed. Or is taking medicine containing Naproxen Sodium before my period be a possible reason why i am delayed? Or is taking medicine containing Naproxen Sodium affect the menstration? Please answer my question.