Idk if I’m late or not

I’m quite regular, almost always having my period every 4 weeks, occasionally a day or two EARLY but never late. Well hubby and I decided to start TTC again, so I started doing opks, and the test came up blazing positive a week early, so it shifted my expected period in the app. So now the app says I’m 5 days late for my period, but today is actually 4 weeks since the start of my last period.

I tested two days ago and it said negative, but I feel like it could’ve been too early. No AF in sight, and the last three days I’ve been nauseous but not wanting to eat and just flat out exhausted, even if I get more than 8 hours of sleep. Like it’s Friday night, but I will 100% going to bed at like 7pm tonight lol

I’m going to wait another day or two to test again (if I can wait that long) but what do y’all think? Trust the app and I’m already super late, or assume the opk was wrong and I’m not late at all?