What do I do?

I’m 5 days late, and my periods have always been regular. I had protected sex on May 25, the day after my last period ended. We used condoms, but I’m not on any birth control myself. The condom slipped off at one point but about an inch was inside of me, so we just pulled it out.

I took a pregnancy test two days ago, and it came out negative. I’ve been stressing about this since then, so I’ve been telling myself that it really is the stress that’s delaying my period. I’ve had stress-related delays before, but I’ve never had a delay this long–it’s as long as my normal period! Should I take another test or continue to wait it out?