This is stupid but I need reassurance that I’m not pregnant

Okay just for starters, I know people are annoyed of the whole “am I pregnant” posts. But I’ve literally got an anxiety disorder so I overthink EVERYTHING. I had sex for the first time last Thursday. I’m 18 by the way. He put on a condom, he didn’t cum inside me either. No, I’m not on birth control. Can someone please give me reassurance? I already asked my boyfriend if there’s any way but I just overthink a lot. I don’t mean to be annoying but my disorder does this to me ☹️