Is a constantly growling stomach a sign I'm not eating enough?

For breakfast I usually eat five to seven salitnes. Sometimes a tangerine or two. For lunch, usually a sandwhich with mustard and roast beef, red peppers plain, and a handful of chips. I usually have a gl or two of ginger ale (canada dry). I have one to two gles of hot Tazo pion two a day. I drink it straight, and I also drink the rinds with no sugar. For dinner a half piece of chicken and some salad usually. I am 5'8' and vary in my weight, from 119 to 126. I am a 15 year old female. You can kinda see the outline of my ribs when I lift up my shirt. My stomach constantly growls, and the notion of some food just nauseates me. I have some health problems I'm currently battling, doctors believe it's mitochondrial disease or disfunction