Suggest Remedy For Numb And Cold Arm After Falling Asleep On Arm

hi i fell asleep on my arm 3 hours ago and after swinging it and shaking it fiercely i still feel numb and cold. I can move my fingers when i turn my hand upside down, but not in the normal position. I can't lift my hand without using my other hand. I am scared, any idea if it can be fixed?