Period Late??

So I’m 10 days late on getting my period. My bf and I had sex right after my last period without a condom but I take birth control and he didn’t finish inside of me. Anyways, I’ve taken 3 pregnancy tests now and they were all negative. I took one 5-6 days before my expected period, another 1-2 days after my period was expected, and one more about 6-7 days again after my expected period. I’ve been SUPER stressed out lately and I have bad anxiety, especially when it comes to pregnancy, so I’m trying to tell myself it’s just the stress delaying my period but I still am worried about being pregnant. I know it’s ridiculous but I just need some reassurance.