Maybe?

I was supposed to start my period yesterday and it hasn't come yet. My period is literally always on time. It comes every 28 days and always lasts 4 days. It's late for the first time ever. My hubby and I have been TTC for a couple months now. Last month aunt flow came. My symptoms for AF are always: super horny, whiny, cramping. I have not been horny...and I'm typically always at least some degree horny, and the last week I just have not been at all. I have been cheerful and not whiny at all. And I have had no cramping whatsoever. Now, I have been peeing like an insane amount, constantly. And I have not increased my beverage intake. I have had slight pains directly on my vagina opening, which is a weird and new feeling. And I have been feeling nauseated on and off for the last couple of days. I've never been pregnant before. What do you ladies think of this?