Go to your doctor as soon as possible.
I've never heard of that...but, if you have epilepsy, and it causes shaking, I'd ask the doctor if it could be connected...It must be very uncomfortable for you....
Oh my gosh, I thought I was the only one this happened to. suddenly, I will get up out of bed, or off the couch, etc and my body suddenly gets a spasm of chills so intense my heart literally freezes up and I'm terrified I will have a heart attack. I don't have the answer other than low body fat, efr