Sometimes i dont even look pregnant, i dont feel him or her move yet,?

im kinda startin to think he/she might not even be in there anymore i kno it sounds crazy but i use to have a since of fullness, and now i feel empty somedays i dont even look pregnant. the morning sickness stopped (thank god) and ****, but im gettin kinda scared to go for my sonogram on the 11th and they tell me that i had a miscarrage or something. is that normal?