okay thank you. do you know if its possible that i could be pregnant? my left boob has been slightly hurting

so ive been on the pill for about four months now, and i had sex (using a condom) on the first week of the pack last month. i never miss a pill and always takw it at night and almost the samw time. everything went fine but i didnt get my period until the last two pills, so it only lasted two days. i...