I feel like I'm shaking but I'm not and the soles of my feet are hot, anyone?

I’ve had the shaky feeling before but only in my torso and arms.

I feel like I’m shaking inside but others can’t see it. Today the shaking can be felt all over my body, including my legs and face. It also feels like my muscles are subtly and slowly tensing up and every move is an effort.

The soles of my feet have become really hot since this started around 2pm today.

Has anyone else experienced this?