No Sleep 😴

Anyone else wondering if they’re doing permanent brain damage from lack of sleep? Little man will sleep 2-3 hours in our arms but only ~20 minutes if we set him down (that’s if he doesn’t snap awake when he hits the mattress). We feel like we’ve tried everything (putting him down drowsy, not dead asleep, dim lights, white noise, etc). He’s 3 weeks old. I’m averaging 3 hours of sleep per day because when I finally have the chance to nap I’m so anxious he’ll wake up I can’t fall asleep.