Difference between Anaphylaxis and normal food allergic reactions is?

I ate so many things last week I don't know what caused my tight throat feeling. I also have this Severe anxiety problem where it also made my throat tight about 6 months ago. I'm so confused if it's a Anaphylaxis/allergic reaction that made my throat tight to somthing I ate ( that I still feel right now by the way) or if it was my anxiety making my muscles tight like 6 months ago.I'm not allergic to anything but allergies can develop at any time I believe. One more question would be, if you're allergic to a certain food. Would you get a rash out of it if you rub it on your skin just as well as ingesting the food item too?