So i woke up 30 minutes after i had fallen asleep and i woke up with a really fast heartbeat, heavy shaking, and for about 2 seconds i didnt know where i was. I woke up turned the light on and drank water and began to breath slowly. It went away after about 5 minutes. Ive seen postings that people have had the same thing and that it's a panic attack. They added that their toes an fingers were numb. I do t remember if my fingers or toes were either. Also i just started getting a weird sensation on my legs. Sometimes the sensation moves up to my arms and head. It feels like a wave of chills that just doesnt stop. It only happens when i lay down to go to sleep. Help please? I havent seen a doctor about it yet also.