he like you, he was just having fun, you got pregnant "in his mind you broke the rules" even though he contribute to it. you scared the heck out of him, he wanted to make sure you got rid of it. but he's afraid of that happening again, this is why he's ignoring you.
that's why it's good to hold off on a sexual relationship until you establish a relationship with the guy. have you heard of the three month rule....take time to get to know the guy, you might find out you dont like him and dont want to have sex with him.
and another piece of advice is dont bother dating guys that have different interest than you, because that will only lead to confusion.
write a list of things that you want in a man. so when you meet someone i don't want you to settle.

My advice is move on. This guy obviously isnt willing to pay once hes played and his manic behavior just screams that he is not ready to be in a relationship in which he might actually have to put out some effort or responsibility. He sounds like a selfish jerk who only wanted to make sure you finished what he accidently did.

I agree with the above post dear...move on. He isn't worth wasteing your thoughts about. And for future ref. don't ever let a guy push you to do things you have no desire to do it will only wind up loading regrets on your shoulders. Please be more careful in the future and use two forms of BC to keep your body safe and so you won't have children before you actually have a loving and supportive partner in your life.