Late Period

Late on my period by 3 days. Boyfriend was in me raw for like maybe 2 minutes about a week ago, didn’t cum at all; in me or out of me.

My boyfriend hasn’t cum in me and we haven’t done pull out method, it’s always been condoms besides this time.

I’ve had my period every 16 days for the past year and I recently started a new job while still in school so I’m stressed and getting little sleep.

I’m currently having cramps that feel like menstrual cramps and diharrea. My boyfriend says I’m eating like I’m about to start my period.

I took a test today and it was negative. Is it likely I’m pregnant?