Late last night, just before going to bed, I got a craving for sour cream. I LOVE sour cream, with salt added, and some plain bread on the side. It's a Hungarian thing - I remember tubs of sour cream being served as a school lunch with a slab of white bread on the side.
As I stood in the kitchen with my snack of salted sour cream and a piece of biscuit, the thought suddenly entered my mind that maybe such an odd craving at such an odd time meant I could be pregnant. As in, I had totally forgotten that I was already 30 weeks pregnant, and was standing there trying to figure out if I could be "late" and whether or not I had any pregnancy tests in the house. All these thoughts only took me a split second, and then it dawned on me that, um, yes, I was already very pregnant.
Almost as fun as when I actually forget how old I am, and have to sit and think for a minute.