3rd month TTC!

Average cycle length calculated by Clue app is 26.5, but when I look back through my charts I am sometimes 27,28 and have gone right up to day 30 before starting period. Day 31 today and no period. I had period like cramps on the 10th (day 28 of cycle) and I thought “oh here it comes” but nothing happened? What’s going on here? I’m too nervous to test as knowing my luck it will be negative, and my period could be right around the corner anyway! Should I wait a couple of days and then test?! 😭😩

I don’t want to get my hopes up!

Thanks everyone.