Sarah, your belly is shaped just like mine was with both of the girls, kind-of has a flat part right out in front. I think I'm heading that way again, too. Is that a shoulder of part of their back that does that maybe?
Mimi-LOL-I also have a single stretch mark above the belly button! Lots of stripes below, but just the one above and it is directly over my belly button, like a line coming out of it.