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Back pain caused by allergy?

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Has anyone ever heard of excruciating back pain, onset by a food allergy?

I had my boyfriend's leftovers from Applebee's--an oriental chicken salad---at around 9pm last night. By midnight my back was in excruciating pain. It radiated from my lower back to under my ribs and even breathing caused pain. I actually considered the ER. Is this something that could have been caused by the food allergy? I laid in bed in unbearable pain until the allergy medicine kicked in and put me to sleep, and today it is sore as if someone stomped on it holding an elephant. What is it?