I'm confused, did you confirm O and this is a second positive lh test? I'm not sure why you would be testing at CD 21 if you hadn't confirmed O. So trying to wrap my head around things. It looks positive to me, but I am not familiar with the brand. If it was lighter today, then I would think you Oed late which would also explain the negative pregnancy tests. I of it was from a pregnancy/hcg then it should be dark today as well and the hpt would have been positive.