I think the father would be my boyfriend but I am young and don't have too much knowledge to this

This sounds very horrible and I am embarressed to talk to anybody I know about it. I am pregnant, about 7 weeks is what the ob estimated through a blood test. I have been with a guy for a year and we have unprotected sex frequently. Well on the 7th of august I took a trip to Virginia and had unprotected sex there with someone I knew because me and the guy back home were fighting. We used the pull out method. But I know that's not very trustworthy. Right before going to Virginia like I said me and my boyfriend had unprotected sex. Going off of 7 weeks pregnant (now almost 8) I think the father would be my boyfriend but I am young and don't have too much knowledge to this. Please someone help me.. I'm scared.