How common are accidental pregnancies?

Lonely Star

It seems wayyy to hard to get pregnant ON accident. I’ve been having raw sex using pull out method since I was 16, I’m now 20 and have never even had a pregnancy scare. Could I just be infertile? I’ve had raw sex on my ovulation days as well. People love to say the pull out method doesn’t work but it honestly does if your guy knows what he’s doing