Need answers 911!

Lidia • 19 and currently living in my relationship goal
So me and my boyfriend got to it last night and he didn't pullout . It was like the last day of my period so it wasn't messy (thank god) and I've been on birth control for awhile but then I stopped for a weekend and started again Monday , Thursday he didn't pullout, do you think I have a chance of getting pregnant ? 😓