The baby is almost 2 months old. Previously, he slept poorly for 5-10 …

The baby is almost 2 months old. Previously, he slept poorly for 5-10 minutes during the day and woke up. He only slept well on his arms. He has been sleeping continuously for three days now. He eats, wakes up slightly, and then falls asleep again for 2-2.5 hours. Is this normal? I read that if a child is autistic, they always sleep like this.