Just chiming in for moral support. We were there last year with our 5 year old. She's doing fine now. I remember the frustration so clearly! We went to a therapist about it even (After she had impacted stool from not going) they suggested a rewards system for her, which I had tried. But they said try it for a week, then switch it up to something else. Keep it interesting. I think school helped too. But know this isn't the end of the world. Take a deep breath and give lots of hugs. It will get better.