Can anyone explain???

Ashley

I got my first positive opk Nov 30th. Got my darkest opk late morning on Dec 1st. Got negativeopk night of Dec 1st. Dec 2nd clear negative opk. Stopped testing. This morning i tested just bc and it looked almost positive. Took another around noon and it looks darker then the positive I had on Dec 1st. Why two such dark positives 4days apart???

Dec5th

Dec1st

Dec1st