when i awake from sleeping, i am sleeping on my right side, i sit upon the bedside to get up. i become light headed, 10-20 seconds. sometimes i can't stay sitting up and fall back onto the bed. this happened for about 6 weeks. i went to my pc and she sent me for a tilt table test, which she said came back negative. 3 days later after the test, it all stopped. it only happens when i have been on my right side, never when i have been laying on my left side or on my back. after i get u[p and get going, there is no more problem until i get up on the next occassion. after more than 2 weeks of not doing it, it has started up again. eugene