Lawyers can, generally speaking, prepare their client's testimony, sign their client's name to it and sign their name, as their client's attorney as normal business. It is only when "someone" questions the validity of a signature that the court "might" question the document.
When you say you signed "because of misrepresentation from my lawyer" what do you mean? Are you saying that the "officer of the court" who represented you, misrepresented the order? Or are you saying that affidavits submitted to the court previously, those from which the ruling was made, misrepresented your actual income?
If you believe that your attorney did not represent your true financial status, hire another attorney and ask about filing a motion for a de novo hearing on the order.
A document that has been notarized by any public notary is only a statement that they witnessed your signature. I think that is what SJ meant by having a conversation with yourself. (Who knows since he has been listening to testimony all day is probably getting weary?

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