Positive OPK??? Please help

opk??? Please help" />
Third cycle and I have never had a super dark opk+, so I always second guess my judgement. In the case of this cycle, I was anticipating a opk+ at CD20. It's currently CD22 and I don't think I've gotten a positive yet, but would love another set of eyes. 
***Does the third pic look positive???***
1st pic = CD20 PM
2nd pic = CD21 AM
3th pic = CD21 PM
4th pic = CD22 AM
Thanks for your help lovelies!

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