I pretty much sleep like that.
It’s good to know it’s natural.
I have short sleep cycles as well - I really only sleep soundly for about 3 hours each night. On weekends it’s more of a 3-2-3 sleep-wake pattern, but on workdays the second three is only a dream :)
I’ve been waking after about 4 hours of sleep. Then I’m awake, usually until time for the alarm clock to go off, when I’m ready to go to sleep again. The following day just KILLS me, then I sleep all night the next night, then normal for the rest of the week. The last night of my weekend, I lather, rinse, and repeat.
Hate it.