What might cause faintness, numbness, pain, and lightheaded drowsy and really abnormal feeling only while laying?

Many things. Could be anxiety or medical problems. I suggest you see your family physician. Make sure you ask your family members if they have ever had anything like this. Also does this only happen when you are falling off to sleep or coming out of sleep. If so make note of this. Does your heart skip beats? Start taking your BP first sitting then standing am, noon, 6pn, hs with pulse and axial temp. Keep a log.