I've had this alot over the past week or so. It doesn't just feel like a typical case of having slept on my arm, and then not having any feeling for a while. When I wake I automatically realise I can't move it, it takes a huge effort to try and move it and after about 30 secs I can eventually do so. I experience no pins and needles, just temporary paralysis. Doesn't sound like a long time I know but it's very alarming. My heart is beating really hard and fast, and I felt breathless, although I don't know if this was more to do with me panicking. While looking on the internet, I've come across all these wierd and wonderful illnesses and diseases that I might have and so just to put my mind at rest I am wondering if anyone has experienced this. I do have a heart problem but I don't want to go to my gp if there is just a simple explanation.