OPK help?! did I already ovulate

Had a really close to being positive opk I tested again a few hours later that night still wasn't quite positive.. Tested when I got up the next morning and it was a faint line. Did I miss my ovulation? did anyone else have this happen to them? I am going to test again around 7 tonight. It never was a full positive so maybe tonight it will be? Please let me know if this has happened to you!