hi there - I have been prescribed Naproxen for swelling and painful knees. i have just started taking them twice daily (I am on 4th day) the dose is 500mg per tablet. I have, however, just started bleeding from my front passage (like a period) quite light and accompanied by slight discomfort, stomach cramps and bloated feeling. I am not due on for another 13 days so am surprised. Could this be connected? Many thanks, Lisa