Girls, help! The situation is this: we've been going out for 3.5 month…

Girls, help! The situation is this: we've been going out for 3.5 months on Saturday, 1.30 minutes of walking before, then I gave him breast and the baby fell asleep, then I decided to increase the interval of wakefulness by 5-10 minutes and it went crazy... We walked for 2 hours, starts yawning, I put him down, give him breast and all... crying, hysteria... the child is screaming and roaring with a wild cry... We were at the pediatrician, she said everything is normal, kids are different... but how so... I was crying myself yesterday with him while putting him to sleep... Today I think I'll go see a neurologist... Besides that