Cycle help.

My last period was 9/11-9/15. I’m not due for my next period for another 4 days 10/9. According to my OB who did an ultrasound on 9/16, I should’ve ovulated about 9/18 give or take a day. According to this app, which I know is a guess, I should’ve ovulated 9/25.

I’ve had a few symptoms that can also pass for my period coming which is really a pain in the app. I’m either 16/17 DPO or 10 DPO. Someone give me hope bc all my tests I’ve seen like a VVVVVF line (possibly line eyes) or negative. I don’t know what to do.

😭😭