I am 30 something year old female. We had unprotected sex 3 times on Jan. 30th. No pain, no problems. However, Tuesday, Feb 2 (3 days later) after I masterbated & had an orgasism, I went out shopping for a few hours, then went to the gym. When I got home and went to the bathroom I saw light pink spotting when I wiped. Last night I was so nauseated I couldn't sleep; today I am still nauseated, fatigued,have indigestion whenever I try to eat, & slight case of the poops. I don't think pregnancy symptoms would occur this quickly, but I have never been pregnant so I don't know. I have never been on birth control & usually have pretty normal periods. I should add that my period had just ended Jan. 25th.