HELP PLS

Mia

hi i was wondering if anyone could help me. i had sex on the 4th of November and took the morning after pill the next day however a condom was used too but after he came he put another condom on the wrong way then the right way and we had sex again.Then on the 6th of November I started taking birth control and took a pregnancy test around the end of November and it was negative then i bled for around 2 weeks lightly but enough for a sanitary product. I then stopped taking birth control at the start of December and have since not had a period and i am experiencing heartburn and some nausea but have been drinking heavily over 4 days.Is my period late due to the amount of hormones i was taking in a month or could it be possible I’m pregnant?