Girls, my son has been asleep for 4 days now, he sleeps for 10-20 minutes…

Girls, my son has been asleep for 4 days now, he sleeps for 10-20 minutes at a time, is this normal? He wakes up crying, I just pat him and he falls back asleep? During the day he's fine, but at night it's very difficult every time to get out of bed because of the seams ? We can't sleep together, I can't sleep peacefully, I'm afraid to wake him up.