NEED ADVICE

hey y’all i just need a second opinion, so i had sex with this guy like a week ago and was on like the last 2 days of my period (super light) but the condom kept falling off, and im not sure how long he was in w/o the condom on. i also don’t think he nutted bc he kept complaining afterwards that he didn’t finish but i’m still pretty nervous. half of me is super confident i’m not pregnant, but i’m a mild hypochondriac and keep convincing myself i could be. what do y’all think?