I agree about the Epi Pen. Even without a definitive diagnosis right now, it could save your life.

If you have the breathing problems, use the pen and get to an ER STAT!!

I'm allergic to Penicillin - had it when I was a kid, so don't remember exactly what sort of reaction. I think it was a huge local rash.

My husband is allergic to 5 stinging insects - from wasps to yellow jackets to honey bees. He was stung several years back and would have died if I hadn't taken him to the ER. He didn't have the hives, and swelling in mouth and throat. He simply crashed - blood pressure went way down, even after some drugs. It was scarey.

He carries 2 pens, as their effect lasts only 15 minutes, and he wants to make sure he has time to get to an ER.

If it's a med, with you, you might have to go off everything, and then add one back at a time. Or it could be food. You'll probably have to have skin tests to be absolutely positive.

The thing with allergic reactions is - you can take some med, or eat some food for years and years - and one day, totally out of the blue, you're allergic. I've taken care of patients in the ER with just that situation.