I Was Taken To The Hospital From Work The Other

I was taken to the hospital from work the other day. I am diabetic and felt like my sugar was dropping, I sat down and ate something sweet to raise it. After a few minutes I felt better and walked into the next room to ask a question when all of a sudden I felt like I had vice grips on both of my arms , they then got pins and needles feeling in them. It spread to my legs and face. It felt like my arms were going to break. I then started twitching like csomeone having a seizure. The hospital checked my heart and brain and said all was well. The drsaid it was a panic attack. I wasn't upset about anything. Could there be anything else to attribute these symptoms to?