OPK help

So this is the first month I have used opk test to check when I'm ovulating as my oeriods have been a bit off since coming of BC. According to glow ( before I altered my dates) I was predicted to ovulate on mon 24th however my CM and temps were not consistent with this. I decided to do a opk test to chexk and it was neg. I have checked yesterday and today and yesterdays was darker and today was lighter. Does this mean It may have been a pos test yesterday? Would my LH level still be elevated today if it was a pos test yesterday? The line yesterday didn't seem as dark as the control which is why I retested today but today's is much lighter. Confused