I think she's on it already? Something about "I have my period but I'm getting a little belly".
One symptom of PMS (aka your period is coming) is acne!!! Your period can cause acne! Not just pregnancy.
Hun, just go buy a pregnancy test from a store and pee on it. That's the only way you'll know. While you're there, buy some condoms.
Secondly, get yourself to a Pap Smear by an ob-gyn! You are sexually active, so that means you now need a Pap Smear every single year. While you're
there, get on some birth control pills!
By the way, it's called "ejaculate", not "inject".