Could that have been my positive opk?

I have been using opks since cd 12 as it's my first month using them. Was cd 18 my positive opk? Or are these clearblue easy read tests stuffing me around? I've had 3 cycles of 34-35 days so I'm supposed to get my positive opk today. The last is one I took at 7pm and I took one at 2 pm which didn't even have a faint line but I misplaced it...going to be fun having one of my work colleagues finding that tomorrow morning lol here is my temp chart as well. 

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