OPK confusion!!

Kari • Husband is 39, and we have two boys and are TTC our first baby together
Ok so Feb 27 I used a CB digital OPK  and got a flashing smiley (high fertility), same thing feb 28, March 1, I got my solid smiley (peak fertility). I tested today because I'm having strange dull uterine cramps and got a solid smiley (peak fertility) again. That's 5 days! Has this happened to anyone before and what could that mean? Help! Lol