Somebody please help!!

Okay sooooo I’m 2 days late. Last time I had sex was on July 4th, my period was supposed to come on 2 weeks later, around the 20th. I came on a week early on the 10th. That’s 2 weeks difference from my last period in June. So could I be pregnant???? Because I haven’t been experiencing any period symptoms , I usually get really bad cramps. The only period symptom I have is acne, I always break out on my cheeks when my period is coming. I have to mention that ever since I had intercourse , my stomach was hurting a lot. Not severely , just little cramps here and there. We also used a condom. My friend told me that having sex can change your period. I’ve haven’t had sex for a year and a couple months before July 4th. Should I be worried? Should I give it a few more days?? I’m really scared, I’m only 17 and I just can’t take care of a baby. Please help!