My mom won't let me ask questions. She MAKES me rephrase all my questions into statements. This prohibits my ability to communicate properly. She calls her rejection for questions a boundary, but I don't feel that it's healthy. She says she feels "overwhelmed" when asked a simple question, which is strange to me or abnormal at least. It doesn't seem like she's trying to work on her problem. Instead, it seems like she's just shutting out all questions and removing my ability to communicate how I prefer.

It sounds like your concerns about your mom not allowing you to ask questions are valid. It's important for healthy communication to be able to ask questions, and it's understandable that you feel frustrated by this restriction. It might be helpful to have a conversation with her about how you feel and try to find a compromise that allows for both of your needs to be met in a healthy way. Communication and understanding each other's perspectives are key in resolving conflicts like this.