Allergic or heartburn?

Ok i am only 14. I eat ketchup or salsa or Pizza and I get these really painful chest pain. Its usually for tomato products. I don't know what heartburn is but my friend says thats what it could be. My mom thinks I'm too young. She doesn't Think I need to go to a doctor. I don't know if im allergic to it because I have never had an allergy test. Also, I get this light red mark on my cheek which only happens if I have any tomato products. Sometimes it even hurts to breathe. I got nervous and told my mom but just thinks its a random ache. I don't get it when I have organic ketchup. Can someone help me or know what's going on?