Christ. First of all, I really think it's unlikely you're pregnant if you've been taking the pill regularly. Also, given that you would have had to conceive in the last three weeks at most, I'm not sure you'd even be showing symptoms so early (but someone can correct me on this if I'm wrong). I've had similar worries before but I imagine it's just a bit of irregularity on your body's part.
Secondly (and this is what the "Christ" was about), I think your boyfriend is being awful. No, it's not a crime to want children, but if he's willing to risk that by having sex then that's his problem and he should stick around to deal with the possible consequences. I'm not anti-abortion but it's fairly understandable that if you are, abortion is not an option at all. You probably should have discussed with him before you started sleeping together what would happen if you got pregnant, so that he could have aired his views earlier. Even if you're not pregnant (and I doubt you are), I think you should get rid, because if you ever do get pregnant, it looks like he'd be gone in a shot and you'd be left to deal with everything all by yourself.