To be 13 weeks pregnant, and not feel pregnant at all. I can't wait till I start feeling this baby so that I will feel like there is a baby in me! I can't wait for my us tomorrow, but I'm nervous because I just don't feel pg at all... ugh. But we heard baby's heartbeat 3 weeks ago so I'm not super scared. Oh, and does anyone know if they can guess at the sex at 13 weeks? I've never had a us here before.