Have you been tested for HIV?
Hi
Welcome to the MedHelp forum!
Very low blood pressure and low blood sugar should be considered as the cause and you need to get this checked at night.
Other causes include AIDS, cancer, infections in the body and side effect of certain drugs. It can also be due to severe acidity with H pylori infection and gastric reflux, carcinoid syndromes, hyperthyroidism, and sleep disorders. At times cause cannot be found out.
Since I cannot examine you and know other related conditions you may be having, nor is a detailed history possible on net, I have listed the various possibilities that should be looked into. Please consult your PCP for primary examination followed by proper referral.
Take care!