OPK and my one shot this week!

My husband is out of town for work and we are ttc. Of course, it is my fertile window! I have been taking clear blue opk's and haven't gotten my "smiley" yet. I was thinking of driving to visit him, if I do get my smiley.  At this point, I'm nervous that won't come. My cycles are irregular, anywhere from 32-40 days. Do you think the opk's not working? Should I just go down there anyways? He comes home Saturday morning, but i'm nervous I've missed the window! Here's what glow thinks. 

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