I had fluvirin last night at 7 pm, then I had shrimps both last night and at lunch today. Within 30-60 mins after my meals, I felt so flushed, and skin turns red, and feeling throat flushing and choky sensation. I took prednisone and Benadryl , then I felt better. I have no allergy to either flu vaccine or shrimp in the past. Please advise.