Ovulation confusion...? OPK

My period ended on 11/20 and I can't sleep so I took an opk for the hell of it and I got a solid smiley face which I was not expecting. Do yall think its because of the time I took it at? My CM is dry. I'm super bummed because my DH is out of town until Monday night.. Could the opk be wrong? I hope I didn't miss my window.. Pretty bummed. Glow predicted Friday to be my ovulation date.. Honesty this doesn't look right..  What do yall think??