Allergic reaction (possible anaphylaxis) after allergy TESTING?

Has anyone heard of someone having an allergic reaction after allergy TESTING? I went for follow-up testing after 3 years of shots and experienced an allergic reaction after leaving the office, about 20+ minutes after the final injection. I took Benadryl and was treated with an oral steroid and a bronchodilator breathing treatment. My testing results were very good and improved.

I had the standard raised bump reactions to each allergen, out of sixteen, 9 were zero the rest were 2 or less.

Testing was for

ANIMALS/MITES/INSECTS - reactions to D. Farinae/Cats/Dogs/Horses.

MOLDS - reaction to Botrytis, Candida Albicans and Penicillium.

CONTROLS - came out Negative 0 and Positive 3.

Timeline

DR was pleased. Left office, about 10 min later post nasal drip started, then nose running. Got quick breakfast at Burger King called DR; they said take an antihistamine right away. Popped some Benadryl and headed for DR office. Itching started and ears keep popping (this was the weirdest thing). Called DR again and said I was heading for ER. Iin the past; I've had anaphylaxis and carried an Epi pen. DR had me come in, gave the oral steroid and breathing treatment.

The strangest thing is, the past 4 months (I get shots monthly) I arrive for the shot healthy. After leaving, all my old allergy symptoms start appearing: runny nose, cough, post nasal drip. They continue almost until my next shot. We reduced the amount of serum, that didn't solve the problem. I thought it was an overdose of mold exposure, I'd been working and living in a moldy house and getting shots. This theory is now blown. The past year I’ve had bronchitis and/or pneumonia eleven times. The antibiotic would improve the problem until about a day or two before taking the last pill, and then the symptoms appeared again. I was on a variety of different antibiotics and inhalers. Finally, my DR put me on a sulfa drug which seemed to resolve the problem. I am no longer in daily contact with the house I was renovating (the previous owner had a dog, I have a cat).

I asked if it could be the carrier used to carry the serum. We are going to try shots without the 'hypoallergenic' carrier.

I began experiencing anaphylaxis (of unknown origin) about 30 years ago at the age of 30-something. The first was severe and I went to the ER. Fortunately, I’ve not had any quite that severe, though I’ve been to the ER several times during the first 20 years. The past ten, I stopped carrying my EPI pen, as I had no need for it. I managed to recognize what was happening and controlled the situation with Benadryl. It usually starts with itching; often my ear(s) will get red, hot and itch. It usually resolves with a Benadryl. If it doesn’t and the itching progresses, I take another. I know not to exceed 4. I’ve never had to go to the ER after taking 4.

My daughter (37) began experiencing anaphylaxis in her late teens, early 20’s. My granddaughter (3) had her first experience between 6 – 12 months; fortunately I recognized what was happening while watching her and we got her to the ER. I don’t think she has had any more. Both carry Epi pens.

Both my daughter and I did allergy elimination diets, removing possible causes from our diets, and kept food journals. There were no common foods or situations for either of us. Neither could replicate the problem.

I’m concerned the allergy shot reactions have not stopped and today’s response to follow-up testing. Any thoughts? Thanks for reading my post.