its definatly not silly, the cycle before I got pregnant last time I was OBSESSED with the OPK's, I brought them from the chemist and had never used them before after doing 3 of them I realised they where expired!!!! so I rang the chemist and drove the 1hr round trip to swap at 6pm hahaha, then even though I had all the other Oing signs I just wanted the dam +opk and sure enough I got it on the new ones.
Definatly keep testing and see what happens, I hope your DH feels better so you can get your grove on haha