For the last couple of weeks, I have been getting about 4 hours of sleep a day. It is maddening, with me resorting to ZZZQuil. It does knock me out, but I wake

For the last couple of weeks, I have been getting about 4 hours of sleep a day. It is maddening, with me resorting to ZZZQuil. It does knock me out, but I wake up 4 hours later. I have been used to waking up in the afternoon for years, and getting 7-8 hours of sleep. I recently had a schedule change and I am slowly going insane...