Please look at the photo below.

The top opk was from yesterday - negative

The two middle ones was with second morning urine both with the same urine which was dark so they look old but there not (taken 1 houe ago) - nearly positive

The last one was taken just now - negative.

I'm CD 10 i normally get a positive opk on cd14.

Why the hell did I get a nearly positive opks then a hour later negitive? Could it have been because my urine was dark? Very strange or am I due to O