I'm really glad that you had a cardiac workup. This is the kind of thing that is
classically cardiac-- in WOMEN, that is.
It is often missed or disregarded as indigestion, particularly in younger women.
Hope that you figure it out-- but no, it doesn't match up very well with
food allergy symptoms-- only very rarely will muscle pain that is that focal like that be a manifestation, and it's almost always associated with specific smooth muscle, like uterus, small intestines, or cardiac muscle.
It is almost unheard of for it to be exclusive like this, and in the absence of any other symptoms.