On the 21st of September, I had unprotected sex and although he pulled out, he ejaculated in me for a few seconds. I took the EC pill Ellaone about 10 minutes after this happened, and my period, which was due on the 24th came on the 26th (apparently the pill can delay a period for up to a week). My period lasted about 4 days and was red, heavy and painful on the first two days, then brown on the 3rd and 4th day. My periods are usually like this though. Now, October 9, i have constant headaches, my nipples hurt (especially when its cold), i have stretchy white discharge, and i more hungry than usual. Do you think these symptoms are because of stress? or is it possible that im pregnant?