You need to tell your parents you have persistent stomach aches! Why wouldn't you??
I really appreciate the suggestions. Communities are so important.
I agree that I need to tell my parents that my stomach hurts, but I don't want to sound like I'm whining and complaining. But, it will be brought up more seriously. Mom at least notices that I don't eat much becuase my stomach hurts. She gripes at me for eating nothing for breakfast or barely swallowing one egg. I'm sure there is some Gluten issues going on.
I cook sometimes, but not as often as I'd like. And I do have a job, I teach swim lessons, so I could be buying food. Good idea!
Here's the way to approach this:
At a non-meal time, sit down with your mom and tell her that you have noticed how your stomach feels after you eat certain foods. You might print out a copy of Mark's article and assert that you think it might be a gluten sensitivity, and as such, you'd like to try going gluten free for 30 days.
Assert that you are willing to purchase and cook your own foods, and that you'll keep track of it. Acknowledge that they work hard to provide for you -- food, cooking, education, clothing, etc -- and you don't want them to think that this means that they don't get to eat these things, just that you are not going to for a bit to see if it makes a difference.
usually, if you approach them in an adult-like way, they'll give you a shot at it.