OPK question!

This is our 6th month TTC baby #2 and we have a 17 month old little guy! I just stopped breastfeeding at the beginning of this cycle and have had cycles since he was 10 months old. I am beginning to think it was the reason we weren't conceiving. This is my second cycle using OPKs and last month and this month my tests have all looked similar to this. Making it hard to tell if I'm even ovulating! I am on CD21 and the bottom test is from the morning. I test every morning. Does anyone else have experience with this? Do you see a positive where I don't? Surely all those days aren't positive. 
Thanks for the feedback!