A few months ago, I started mainly eating this one food. Now, I will only eat a select few foods and will starve myself if I do not get one of those foods. I no longer like pizza, mac n cheese, cereal, and many other foods I used to love. One of my doctors says it is likely related to anxiety, but I'm not so sure. I've also been having random attacks of abdominal pain for nearly two months now. It'll last 4-18 minutes, happens once-twice a week, and has happened right after eating and when I haven't eaten for hours. I'm only a teen and I'm really scared, I want it to stop since I am already underweight, but I don't know what to do. Can someone please help me?