flurint, you can expect her to be emotional right now. Try to put up with it and stay with her, even if she acts a little crazy. You can always break up later. I think she's making the right decision, even though I think abortion is appalling, because she is way too young to be having a baby, and so are you.

This will probably be the hardest thing you two will have to face for a good, long time, so try to be there for each other and don't have unprotected sex again.