Why did she waited 2mo's to tell me?

To be honest with you, you only really find out you are pregnant during week 6 - 8 so she was probably 2 months along when she found out herself. Not only that give the girl a little space its alot to take in being so young and an bun in the oven. I understand where you are coming from with your DEP. But explain it to her so she doesnt get the wrong idea that you dont want this baby. Explain to her that you really excited however if they find out you could be disqualified from the DEP for being single and a dad. And as soon as you come back you will be the responsible father you want to be.