Has this happened to you?

I had PROTECTED sex with a condom with my S/O on the 17th. I believe I ovulated on the 21st-23rd. I figured we were safe because we used a condom and I wasn't in my fertile window. But the past few days I've SUPER nauseous which I thought was really strange because I never get nauseous like this. I ended up having a cold a few days later so I attributed it to that, but the cold is gone and I'm still nauseous. I figured I'd wait until my period came to really worry, but I'm now 2-3 days late! My cycle is usually from 26-27 days long, and I'm always on time or early.

Has anyone ever gotten pregnant while using a condom AND not near their fertile window? I'm taking a test tomorrow if I still havent gotten it, it just seems so far fetched that I can't bring myself to waste 20$ when my period should have shown up already.