It's usual for me to sleep afternoons/nap from 2pm-4pm and at night , in bed by 10pm I wake up sometimes 2 or 3 am. Then go back to sleep and wake 6-7am
It's kind of weird that I have maybe extra sleep/wake times and thus maybe I'm aging faster! Or maybe I'm sleeping like a baby i.e fitfully. Babies don't normally sleep the whole night through, often nap, then they wake up hungry and cry.