Is this fetal movement or am I just too anxious?

I am 17 weeks pregnant and at night, for the last two weeks, I've been feeling weird feelings in my tummy. It feels like a swift move and I won't feel it for a while after that. I'm not sure if it is because the movement feels as if it is higher than my uterus should be. Sometimes it feels like gas and other times my stomach starts growling as if I were hungry…but I'm not. Is it possible that it could be fetal movement? Can the baby make the "hunger noise" too?