So I started my last cycle around July 16th and according to an ovulation test i ovulated around the 30th. My husband and I had unprotected sex on the 29th. today is August 3rd and I have noticed random brown spotting when I wipe and sometimes when I'm active, there is some on my panties. when it is on my panties it seems to be brown and a little stringy. I am due for my period on August 13th... Today I had about a 10 min. pelvic cramp and feeling of nausea and wanting to vomit. Is this just possible early menstrual cycle?? Help!!