unsure what to do.. your thoughts would be appreciated

I'm cd 35, 18 dpo, and Af was suppose to show Sunday, Monday at the latest. Nothing. I've never had a cycle this long for as long as I can remember. I've always been one of those people my friends hated because my period was SO regular and always easy. Anyways, no period, nothing but bfns and a few symptoms. Had some good cramps for a few hours Sunday night. I never cramp before I start. Af Always sneaks up on me. Have had off and on cramping all week. Just minor but enough to notice. My wife says my tits are bigger. I'm not sure. They're huge to begin with. The ones that really catch my attention are the random nausea/food aversions and sudden motion sickness I get when I'm driving.