I am on prednisone for anaphylactic reaction which is my 9th day, i took a lower dose 20 mg and I was fine until I took Benadryl 25mg at bedtime, i started having an hyperactive mind, neck, face and hand swelling. Also pressure on my back and my ears got blocked too. Was it because of a Benadryl interaction or prednisone side effect? What should I do?