Nearly passes out
Today I had to pull over my car. It started with my nose tingling and then my hands and arms... My fingers were hard to move.. Stuck in a splayed out position and my thumbs even harder stuck smashed up against the side of my hand.. They were shaking. I got out of the car and got down to my knees... My husband came and got me and drove me home.. I felt lightheaded and odd and my hands acted strangely like this for at least a half an hour.
I'm afraid I have no specific insights, but I would see your general practitioner. It sounds more like a "medical" problem and needs to be seen in the overall context of your general health. Blood pressure, cholesterol levels, exercise regimen, your weight... a TIA is a possibility.
I hope this contributes.