I havent used OPKs since conceiving my son nearly 4yrs ago! Does this look like it might be positive tomorrow? I cant remember how long they take to turn.... thanks!!
Are the lines meant to stay then? i know the control line stays, but when i tested and got my line, it then faded completely hours later - assumed that was normal...?
Mine was like yours, disappeared for a day then came back even darker. Test every 6 hours if you can, there's still hope x