5YO fell, cracked tooth. Help!!

My son fell after school today, he got ran into by another kid on a bike when he was running to the playground. He fell and hit the side of his face (eye brown & cheek bone), scraped his knee and hand and then he told me his tooth hurt. I finally got a good look 20 mins ago and his molar is cracked in half. He had a filling done on one of the molars because he needs these molars till he's 12. Now he has a crack in one. I spent 20 mins calling my dentist and my husband and my mum and he has an app tomorrow morning to be seen but I was wondering if anyone has experience with this before and what they did. He was 4 when the fillings were done and he had to be under deep sedation for it and I just don't want to do that again. It was hard on both of us.