AF?..

Over the past week I've had cramping, I've had a sharp pain in my left ovaries. And had my normal pms symptoms, slightly tender breast, tired, some mood swings,nausea. (Again that's all normal pms for me) And today I feel completely fine, but I still haven't started. And I'm suppose to. It usually comes right in the morning but it hasn't yet and again I feel nothing coming and i usually do. Nothing has changed about my health that it should be late. So anyone know why I'd be feeling that way then be fine today and still not have AF? I know I already ovulated so it's not that, and I really have no belief that I could be pregnant. It's just weird.