EmmaL, you seem to be very concerned about your posts being quoted and have also deleted many of them.
My advice is that if the information you're disclosing is so sensitive, you should stop posting it in a public place. Once you put something out on the Internet, you lose control of it completely. You don't know if others are taking screenshots of your messages or quoting them elsewhere. By "others," I mean employees at your child's school or your ex-husband or people who know him or know school employees. Or lawyers in family court.
You're obviously stuck in a very difficult situation. Is the Internet really the best place to go for help? Or might the situation just get worse for your child if this PUBLIC conversation turns into grist for the dispute mill?