I had this same problem. But having to wake up to get the kid to the bus left me little choice. Take a look at your diet. I cut out refined sugars and switched

I had this same problem. But having to wake up to get the kid to the bus left me little choice. Take a look at your diet. I cut out refined sugars and switched to a (mostly) LCHF diet and I can now function at nearly 100% on as little as 4 hours of sleep. Most nights I get 5-6 hours and can usually function at 100% as long as I get a good 7-8 hours once every week or so.