Do you have any signs or symptoms of sleep apnea? Sometimes those with sleep apnea experience odd sensations when their oxygen level drops causing inadequate oxygen to the brain. The two types of apnea we hear about most often are obstructive and central. Obstructive happens when the airway collapses and closes off. Central is neurologic in origin, and sometimes is a result of head injury or a response to meds that suppress the central nervous system.
There are some medications that adversely affect sleep. Alcohol can cause one to go to sleep easier but have lighter sleep.
A sleep study is the way to find out what's really going on when you sleep. I would be cautious about trying solutions without knowing what is really the cause.
You might probably be suffering from insomnia. There can be several underlying causes for this. Medical conditions include chronic pain syndromes (eg, arthritis, cancer), advanced COPD, chronic renal disease, chronic fatigue syndrome; neurologic conditions include headache syndromes; psychiatric conditions include depression and anxiety. It may also be linked to alcohol or stimulants.
I would advise that you consult a sleep specialist or a physician with your sleep diary for a complete medical evaluation. The treatment is directed towards rephasing the sleep cycle and circadian rhythm in accordance with the external environment. Sleep therapy along with sleep hygiene (avoiding caffeine, alcohol and tobacco as well as stress reduction) in due course of time helps the patient get proper night sleep. The other treatment options available are bright light therapy and chronotherapy, cognitive behavioral therapy (CBT) which might improve your sleep. The different approaches used are stimulus control, sleep restriction, relaxation therapy, psychotherapy and maintaining sleep hygiene. You are advised not to read, watch TV, or do anything else in bed. You are also advised to go to bed only when you feel very sleepy.