Is it because of excessive pushing or am I preg?

Could be either or. Pushing on your stomach pregnant or not is dangerous and can hurt you. You need to stop that. The pull out method does NOT work (my daughter is proof of that) I would take a test if you're late and if you turn out not pregnant you need to find some kind of birth control. There are other forms then pills and condoms. Spermicide, diaphragms, and other things like that exist to help avoid pregnancy. If he still refuses and only wants to pull out, stop having sex with him until he does use them. Do not let yourself become pregnant due to his negligence.