Need help!!

I have two app tracking my period.

Both app stated two different information, so I’m either 14 or 16 days late for my period. On my 1st day of missed period, I POAS, but it was negative.

These few days I’m having heartburn / acid reflux, I used a ovulation kit and tested on my 2nd morning pee and its positive that I’m ovulating.

So I’m confused is it alright that ovulation can happened so late? My last period was on 24th May. So I’m ovulating now?

UPDATE:

I tested now and it says I’m pregnant!

Gonna check with a doctor soon!