HELP!

I took an OPK test at noon and it was almost positive but not quite there yet...

Then by 3pm I had a positive...

Now at 9:30pm it’s negative..

Has anyone experienced this?! Will I still be ovulating in the next 12-36 hours?? Hubs and I BD’d about 2 hours after positive result & yesterday.

Bottom test was at 3pm ⬇️

OPK at 9:30 pm ⬇️