OPK Help-When did I ovulate??

Cara

Here's my most recent OPK's. I never seem to get strong positives but was hopeful on 9/31 and 10/1 (did 2 strips this day) but then my digital tests those days didn't look positive at all :( And what the HECK was going on 9/24?? That was way too early for me to be ovulating. What do you ladies think? Thanks in advance for any help!