Solu-Medrol and blood pressure

I was given solu-medrol for an allergic reaction to something unknown. I was given benadryl just prior because of my itching hives.
Immediately after the RN injected the solu-medrol into my IV I started choking, I couldn't catch my breath, I felt as if I had a rush of adrenaline but at the same time it felt like my heart was fluttering. My blood pressure and my heart rate jumped up considerably. I was unable to speak and had a hard time swallowing. My vision was effected and I had light sensitivity, everything suddenly seemed very bright. My thought process was very distracted, I would try to speak and within a second forget what I wanted to say. I had to concentrate extremely hard just to get out a single word.
I also had slight numbness or loss of sensation in my hands.
I don't want to know what would have happened if I hadn't been given the benadryl first! I felt as if someone was inducing brain damage onto me and instantly turning me into a vegetable.