I know you said you’re used to it, but you really should try to at least rest. You’re brain can actually be damaged from lack of sleep! It takes almost a week of continuous sleep to make up for one missed day. Obviously that’s not possible, but trying to fall in with your body’s natural circadian rhythm will help. (My natural rhythm is going to sleep at 11-12 at night and waking up at 9-10, so everyone’s different!) Hope you feel ok!
Yeah, my normal rythm is I start to actually feel tired at 3-4am but normally don't end up falling asleep until 6am and wake up in between 10-12 XD During the time I'm awake I usually draw a little more or game/watch TV, usually the things I don't get to do during the day.
That's been my normal for years, it's part of my lifestyle at this point, I just run on lesser sleep than most people, but I will say this...highschool mornings were a bitch XD
(P.S. Life has already given me brain damage, it can't get much worse than what it already is 🤪 XD)