Please please help!!

I just need advice/opinions before I go bonkers. TTC since June. Super irregular periods (docs say it's abnormal but not worrisome). Thought I might be pregnant (super strong pos opk jan 14-17. Four days! Felt weird like I was ovulating so took the top pic (frer opk) so incredibly positive and this was yesterday!!! So I took a clear digital today to confirm and try tonight and it's neg!!!!! How is this possible! I should have 48 hours from yesterday right? I'm so flippin confused.