Pregnate or not

Patient: I had sex on the 1.12.13. i got my period on the 3.12.13. i started taking the pill on the 3.12.13. my period was lighter then normal and was scared it was inplantational bleeding. i stoped taking the pill on the 13.12.13. a few days later i woke up to bad cramps and bleeding not spotting. could i sill be pregnate?