2nd line disappeared?

Hi!

I had a positive test 11 days after ovulation. 2nd line was faint but turned up at the 3 minute mark. Went back to the bathroom later that day and realised I forgot to throw it out but when I looked at it the 2nd line had disappeared? Now 14 days past ovulation, period is due today but hasn’t come yet. I’ve tested every day since and gotten negatives. Anyone had a 2nd line disappear like this before!?

Not having much luck with this pregnancy.. first month had an early loss, 2nd month no pregnancy but found out I had a cyst on my right ovary and now this month this weird positive test which may have been a false positive!?