I also get pins and needles… over my upper body, face… and i feel like my body is very hot from inside like its burning… i get sweat even when im in AC… Try to have some blood tests etc… im gona do this too

It is due to the lack of oxygen in your body which slows down the circulation of your blood

When the body is under stress the peripheries (fingers and toes) blood supply is reduced to compensate for vital organs need for increased blood and oxygen.This is a primitive and normal reaction to stress and anxiety.When cave man had to outrun dinosaurs for example,vital organs( brain,heart,lungs kidneys) were needed for survival in the acute phase of the stress experienced.
Similarly your anxiety produces a stress effect that causes your fingers and toes to feel numb and lasts for a short time or until your perception of the stress subsides.

sumtimes that is due to hyperventilation, if ur worrying about something it will panic u n make ur breathing numb, makin pins n needles.
I was told to breath into a paperbag. This helps u calm down aparantly

Its from your nerves. I suffer with this also. Because i suffer with really bad anxiety the first time i experienced this i thought it was a sign of a stroke.
When you have stress and anxiety it affects your whole body. Your nerves can cause alot of weird reactions in your body, wether it be pin and needles or muscle pain. I suffer with alot of muscle spasms which im told is due to my nerves. I also have swollen glands which has been proven to be caused by my nerves.