I had surgery for an ovarian cyst May 13th. Since the surgery I have had my period (lite) 3 times. The first was 4 days after surgery. Then the next time it was a week later, and now 11 days later since the last one stopped I notice blood again. Two days ago I was ovulating....could this be related? I am confused. I was having really bad back pain the last 2 days as well.