Testing 2/28 cycle buddies?

Natasha
My AF is due around the 28th...this is our 2nd month trying for our first child. 
 I took a digital OPK on the 10th just to see if I would ovulate early, and it was positive, then I tested again just because on the 13th this would be my 14th day after AF and it was also positive.. I don't know why it was positive on both days.. I need ladies to talk to.