I have stomach growling all the time and it gets sooooo loud and I'm a hypochondriac so I'm really scared that it might be something bad and I also sometimes get stomach cramps and lower back pains, also whenever I think about eating I feel like throwing up I am also about 5 foot and weigh at around 90 pounds and my doctor says that I am toooo skinny and under wieght I do not make my self this skinny I'm actually trying to gain weight so plz help