I had unprotected sex on monday and now i'm spotting and having abdominal pain. my period isn't supposed to come until february. am i pregnant?

STD? PID?: It's too soon for pregnancy symptoms. Vaginal spotting plus abdominal pain suggest an infection, probably an STD, and probably involving the fallopian tubes -- i.e. pelvic inflammatory disease (PID). It can make you sterile if not treated promtly. See a doctor ASAP. If your own doctor isn't available on the weekend, go to an urgent care clinic or emergency room. Don't mess around with this.