I would like to know if I have an allergy.

Patient: Hi I was wondering if I may have an allergy to rye (i’m allergic to rye grass) or gluten (not allergic to wheat or corn though) or dextrin or food coloring dyes that are artificial , since I was eating cheez-its and starburst last night and noticed my throat hurt and felt awful(I saw that it looked like I had a slight rash and it was noticeably raised-but not extremely)?

Symptoms: Rash on neck ,throat discomfort