Puffy Face and headache

I think I am getting this allergy thing figured out ..I am not supposed to be eating glutin or dairy so what did I eat yesterday frozen pizza hmmm its odd because I can eat a cheese buger and feel fine the next day so I am not exactly sure what gave me these symptoms this morning ..gonna start paying more attention to what I am eating ..I did have my allergy test so I know what I am not supposed to eat but I do cheat and sometimes I get away with it ...last week on Easter I ate foods that I wasn't supposed to and ended up puffy and headachy then too...this changing how you eat is very hard to do and not something that I have been able to do in a quick fashion.