I have a son too and my ex is kind of the same. I know it's hard to be away from your child when they're sick. It's a mothers nature to need to take care of their children. I really suggest you take a deep breath and continue to get updates about it. If he doesn't get better you might want to go further and try to pick him up. It all depends on your custody agreement. I stand with you but try to relax. I know it's terrible, its happened to me. Take time for yourself for ten minutes and continue to get updates. It will be okay. If you need to speak with someone I'm always here. Breathe.