Don't know what to think

On Friday I went out with a guy I just met. He's 20 and I'm 17.And we were just hanging out and he started making out with me and asked if I wanted to go somewhere private. I said yes because I thought he only wanted oral and I didnt want to have sex. In the end he ended up taking off my pants and having sex with me even though I said no because he didn't have a condom. He said he pulled out right after. But he's been persisting to go out again ever since then.  I told him I didn't want to have sex and and I didn't want to hang out. So I guess he got angry but at the end he sent Me a text saying  "I don't know if a pulled out in time". My friend says he's just messing with me because he's mad. My period comes in 2 weeks and I'm really worried about what to think and do.