On the pill, had unprotected sex while on my period, can I be pregnant

I've been on birth control for the past five months and I had unprotected sex april 5th while on my period, he didn't cum in my or anything. he only stroked a few times. my period ended april 10th and ive been paranoid of being pregnant that I took two pregnancy tests the 21st (roughly two weeks after sex) and they were both negative. im not supposed to get my period until may 8th, I just need reassurance that im not pregnant. any advice/ help?