Need help, I think my Girlfriend might be pregnant!?

My girlfriend and I were fooling around one night and she gave me a hand job and then about 4-5 minutes after I came I fingered her and I'm not 100% sure if I had anything on my hand or not, and so a couple of days after that she went by the store and got one of those EPT's, it was negative, she was supposed to have her period on the 17th of march but it hasn't come and she just recently went to get 2 more EPT's and one was positive and one was negative. I really need your help, I'm only 16, I know it's stupid to do all this stuff I won't ever do it again, I never meant anything to happen, please help me.

Her period might be late,but there could be a 50% chance she is pregnant. Go to a doctor?

she may only be late stress can do that, exercise can too, some time you just miss it. she should have an apt. with her doctor.
It doesn't sound very likely to me but she sound go see a Dr to be sure.
Sweetie you need to try to calm down. I know this is hard, but do your best to keep your calm. Okay, if there wasn't penis vagina penetration, then her chances of being pregnant are VERY VERY LOW. Even if there was some semen on your fingers, the chances that she may have gotten pregnant from that are vertually impossible. If you are both scared, then you can always go to the dr. and get a blood test to prove that she isn't pregnant. As for one positive pregnancy test, that's probably because she let it set for over 30 minutes, and then went back and checked it again. If it sets for 30 minutes or longer, the result WILL CHANGE giving you a false answer. I do wish you both good luck in the future!
If she really had a positive pregnancy test then chances are she is. It's much easier to get a false negative than a false positive. Have her go to her Dr. or a clinic for a free pregnancy test and put your mind at rest.