Am I Pregnant

Okayyy soooo. I’m a freshman in college . I started school in the beginning of August . I met this boy at a party and we really hit it off and started texting and talking a lot . A couple days later he texted me and asked me to come over to his house that night . I went and we ended up having sex and it was great . after that I went to his house a couple times every week and we would have sex . We aren’t in a relationship or anything . Just enjoyed having sex with each other. My problem is that we never had sex with a condom and I’m not on any type of birth control. We’ve stopped having sex recently but he never asked me if I was on birth control until the last time we had sex . He didn’t ask when we first started. And now I’m around 5 days late for my period and I feel like I’m gaining a lot of weight . We’ve had a lot of sex but he also never came inside of me so I’m very confused and a little scared right now . Can someone help or give me any words of encouragement.