Help! Confused by OPKs

First cycle off BCP. TTC#2! Had an HSG to conceive #1. I was using OPKS then but wasn't actually ovulating per infertility Dr. Thought I'd use OPKs to see if I will ovulate this cycle but these are just confusing....almost positive with SMU but as the day goes on they get lighter...I know it's still early in my cycle but I'm hoping not to have the same issues as last time. Any opinions would be welcome!