Could I be pregnant?! Help! This will be kind of long

Giselle
I could really use some information if you ladies could help. I have been on birth control for about six months already. I took it every day not exactly at the same time and if I ever missed any it would only be one day and I'll take two the next day. So for my last period it ended on a Thursday but I didn't start my new pack until Saturday. And I honestly can not remember for the life of me if I had unprotected sex that same Saturday or Sunday. he did finish inside of me and I didn't take any plan b. For the first week of my new pack I forgot to take it for two days in a row but on the day after the second missed I took two for that day and the previous day. I Started my new pack about a week ago and I stopped taking it Monday since I am no longer with my boyfriend after a year and a half. What are the possibilities I could be pregnant?