My son turned 2 in November, we’re currently on potty training week one. He keeps holding In pee/poop until he can’t hold it anymore or nighttime the minute we put his pull-up On for bed he poops. We sit on potty every 20-30 min and he just says no over and over. We’ve tried reading books to pass time, blow bubbles, make it exciting with rewards. And he just doesn’t want to go he holds it. Is this normal? Is he not ready? I’m due with baby sister in 9 weeks and need him potty trained by then lol.