I have the same thing, insofar as I don’t feel sleepy until around 4 AM, then I urgently need to sleep. No need to hurry to a doctor because most doctors still don’t know diddly about sleep. But you might ask, next time you go in, about getting a polysomnogram (sleep study) in order to rule out things like sleep apnea or restless leg syndrome (yes, its real). There are a lot more sleep clinics now than there used to be, so insurance companies are now more willing to foot the bill.
I had a sleep study done years ago which confirmed two things: I had a severe atypical delayed onset insomnia that made it nearly impossible for me to get to sleep in less than 2 to 3 hours. And I also had restless leg syndrome. The importance of this diagnosis is that it ruled out depression, sleep apnea, and the default hypothesis that you are a lazy immoral person who would rather wile away the day in bed while other people work.
Armed with this diagnosis, I was able to get a written “reasonable accommodation” plan which you are entitled to under the Americans With Disabilities Act, but which most employers tend to ignore because they secretly know that you’re a lazy person who would rather wile away the day in bed while other people work. If you go to a doctor with your sleep complaint, the first thing they will do is try to put you on anti-depressants. Many of these are glorified chemical cousins of methamphetamine, and since you tend to feel down because you are tired all the time, you may feel inclined to give them a try. If you have been this way all your life, they won’t work, and they will try to put you on another one and another one, and so on. You can cut through all this by insisting on a sleep study.
Before I had my sleep study I would try to control my sleep cycle with tranquilizers. They worked. Let’s face it, the world is organized by morning people who are all ready to go at 7 in the morning but are pretty useless at 4 in the afternoon when you and I are just hitting our stride. There is a career cost to anyone who can not make morning meetings. You just don’t get to meet the morning people who are in charge of the world and you tend to get passed over for good assignments and promotions. And they resent having to schedule staff meetings in the afternoon when their energies are fading.
So, if you want to make the morning meetings and get ahead like everyone else, one option is benzodiazepines. The downside, of course, is that you get addicted to them, but so fucking what? People are addicted to all kinds of things like nicotine and caffeine and they aren’t lying in the gutter begging for spare change, or rolling tourists to get their next fix. If nothing else works, you might want to trade a few years on benzos for the chance to get yourself in a position where you are senior enough to control your own schedule. Just don’t spend 18 years on them like I did. Benzos are the most difficult drug to kick, and the longer you are on them, the more difficult they are to kick, but it can be done.
There are now alternatives to benzos, like Depakote, which is an anti-seizure medication, which is also used in bipolar disorder and a bunch of other things. It works on the same part of the brain as benzos but it is nonaddictive and has very few side effects. Its not a sleeping pill. It works by quieting the mind and tamping down your emotions. And it also repairs some of the effects of extended benzo use. Some day you will be able to retire and sleep when you want and get up when you want. In the meantime you just have to make do.