Ever been so tired you can't fall asleep? I'm going on about 9-10 hours sleep since last wednesday. All the color has leached out of the world at the moment and I can't sleep. Thinking about having a shot and taking half an ambien.
Ironically I work with sleep disorders. What you need to do is enquire with your doctor about local sleep labs. They can measure exactly how much of each level of sleep you get, how your body responds (PLM's or "Peripheral Limb Movements") and other variables such as your pulse, oxygen saturation and brain waves beyond sleep. It's the best way to find out what's going on accurately. Many smaller hospitals have sleep labs now as Obstructive and Central Sleep Apneas are becoming better diagnosed and understood.
Ambien is good for falling asleep, but not necessarily staying there. Also yes mixing ambien with alcohol is never a good idea. Be warry with ambien, has weird side effects, one other nurse I know woke up eating her dogs kibble