Help - first cycle using OPKs - positive?

So this is my first cycle using OPKs and 2nd cycle TTC. Today is cycle day 13, and Glow predicted ovulation day to be Friday (CD 17). In person the test line is darkish on the left and blurs on the right so I’m second guessing if it is positive or not?!

I also don’t really know my cycle length (last cycle was first one off BC and was 30 days).

Today’s is the one on the left or bottom.

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