I don't know what is going on
I had unprotected sex a little over three weeks ago. My period was due on feb 18th and came on Feb 21st. (I have never been late except when I was pregnant with my daughter and when I had my two previous miscarriages) When I started it started with a little bit of brown discharge, the next day I had severe pain and a lttle bit of bleeding, the coloration was a dark red with a brown tint but now clotting. After that I had 6 days of brown discharge or old blood but nothing red. I have been nausious, my breasts feel heavy and the outsides of them are tender to the touch, and headaches ona daily basis (the headaches are not piercing just a dull annoyance) Before my period I took 2 home pregnancy tests that came back possitive, 2 that came back negative and a blood test that came back nagative. What do you think it could be? Please help me.