Could I get pregnant??

So I’m on birth control and i take two packs and then take the sugar pills twice. So every two months I get my period for 2 days. I had sex 3 days ago and he busted in me. I just finished a pack and it’s my first so I should have another month of not being on my period but I haven’t picked it up. If I just take the sugary pills and am on my period could I get pregnant? It’s been three days since I’ve had sex and my boy isn’t used to having me period every month.