15dpo no Pms bfn

Kerry
Ovulated 15 days ago, checked with Opk. Usually have Pms symptoms a few days before AF is due. I've had nothing. No sore breasts, no chocolate cravings, no cramps. I feel totally normal, which isn't. Took test this morning, day AF is due, and negative. Anyone else had this happen? What was the outcome?? Thanks!