I have been having problems with sleeping or laying down. when I lay down for about an hour I get a feeling of illness through my body. It feels like my heart is under strain, and I often lose feeling to some parts of my body. I feel weak as well. It is a slightly different feeling when I turn and lay on the other side of my body, but still a feeling of illness and light headedness. I feel like Im going to die. I have been going to my doctor but she is now away on vacation. they did lots of blood work on me. all of my electrolites were normal, so was thyroid, vitamin D level was low. my doctor prescribed me ativan for anti anxiety. I have not taken it yet because I feel there is some underlying cause. Im 22 years old, and am fit, I dont drink or smoke, and I do not do drugs. I have been eating especialy well since this started a month and a half ago. Ive been to a chiropractor who has tested my sensory(normal). Although he did say my oxygen saturation was low at 85%. These feelings sometimes happen during the day and are getting worse as time goes by. night is especially brutal and im losing alot of sleep. please help:(