I had my iud removed in may, then had a 20 day period. Next period started may 31. Lasted 7days. Had sex on June 14 and 16. Using withdrawal method, husband says he might have not pulled out in time. Since day 16 of cycle, I ve had cramping, a pulling feeling in my abdomen, headaches, and sore breasts. I sometimes feel really tired, and feel lightheaded and dizzy since day 16. I still have 6 days until I have a period but I feel very pms or pregnant. Is pregnancy possible?