I stopped taking the pill and had unprotected sex 3 days after my period stopped and now i have light cramps could i be pregnant ?

Possibly: Ovulation occurs about 14 days before the next period. In one who has a 25 day cycle, she will release the egg day 11 (the 1st day of a period is "day 1"). If your period lasted more than a 4-5 days, it is possible that you conceived this cycle. It is unlikely that pregnancy symptoms will occur before a period. Cramps are non-specific; could be due to ovulation itself, premenstrual or non-gyn.