Help ! No condom

Hi so I had sex about a week ago for the first time with my boyfriend. I stressed out and it only lasted about 5 minutes. I’m very stressed since I didn’t use a comdom. He didn’t cum, and I was on my period. Also there’s a very low chance of getting pregnant on your period. My <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a> said I had a 1% chance if he had busted in me. I do know about Precum. I’m just stressed. Everyone I’ve talked to about this has reassured me... what do you guys think?