Am I pregnant? :((

So on the 19th of February me & my boyfriend had sex. He went in raw for about 40 seconds & swears there was no precum. I know it's very unlikely to get pregnant from precum but I'm so scared. He didn't cum anywhere near my area, but I'm still super worried. My period was supposed to start on the 10th of this month. Usually my periods are a bit off from scheduled & my cycles can range from 25-32 days. I'm still super worried. Has anybody been in a similar situation?? All my close friends, including his, say that I'll be okay. However, I'm still super paranoid. Help pleaseeeeee :(