New allegies each day

Patient: I am a relatively healthy 48 year old white female. Over the pas year, i have developed several allergies including one to wheat, fish, strawberries, NSaids and the list seems to grow each day. When I went to my GP, he told me to take Zyrtec at night and Clariton in the morning.I am. Now, I have developed a rash that is like hives and it spreads each night.Where should I start with the researchfor this illness?