He’s never slept well. I rock him standing up, he’s clearly sleepy but cries and throws his head back and wriggles. I try push him in the push chair and he cries constantly and doesn’t fall asleep. I end up finally shattered at 11 on when he finally falls asleep. His day time naps are like 20-30 minutes and it takes ages to get him to settle. I’m struggling with back pain. Any advice ?