i am suffering form back and neck pain since couple of weeks , had pins and needles and totally blackout today. hi , i am suffering form back and neck pain since couple of weeks , today when i was doing my exercises for my neck pain , i suddenly blackout and felt pins and needles in my body. I also felt weak at that moment. Would really appreciate if you could please advise me , what is happening and if there is something to worry about . I am also a heart patient.