You don't need an Attorney to go back to Court. An Attorney is helpful, of course, but if the child is at risk the father needs to do something now. The school social worker might be a big help. The child's pediatrician can be a big help. It varies by State and by area. Depending on who asks for a study you may or may not have to pay - the school has resources.
The mother's medical condition does not sound related to the child's problems. I appreciate she has MS but that doesn't seem to be the reason why the child is being neglected, if she is being neglected.

