Is it possible to get pregnant without ejaculation?

My boyfriend and I attempted to have sex for the first time about a week ago, I'm on birth control and take it correctly so we used no barrier. He couldn't get in very far, and he didn't cum inside of me or at all.

My period usually comes late and is very light so I can't tell where I stand on it.

I know it seems dumb but is there a chance that I could be pregnant? I'm very worried and I just need some relief.