Bloating and nauseous

I’ve been bloated for the past 2 days. I can’t suck in my stomach or anything, and I just became a bit nauseous this morning. My period is about 5 days late, I’m not sure what’s going on but I can’t stop panicking. I know it’s most definitely the Plan B, but because I had sex after that (protected) I feel like a i could be pregnant. Even though it was with a condom, because Plan B never caused me to second period I can’t stop panicking😔 Has Plan B ever made anyone get their period, but miss their next one?