Each time I lay down to sleep on my pillow after a few seconds I get a pulsating throbbing sensation in my head. I spend minutes changing position to find a spot where the throbbing sensation stops and I fall off to sleep. This also occurs when I take a nap on my recliner using a cushion under my head as a pillow. I do have tinnitus and vertigo and sinus problems (if that helps). Any help would be appreciated.