I think I have IBS or a UTI! Help!

L

So here’s all my symptoms..

Pooping a lot

Gassy

Lower stomach pain

Feels like period cramps

Headache

Nausea but no actually vomiting

Upper back pain

Really tired

Frequent peeing

I’ve been super stressed lately and maybe this caused it but I’ve looked up all my symptoms and they all say pregnancy but I’m for sure not pregnant. And also My periods not for another 12 days! Anyone with advice ?