If you already have been subjected to temporary orders
, and there is no new hearing set, then you would move to modify the temporary orders on grounds that new evidence exists, in the form of testimony by an expert that you are not suffering from any mental health issue.
If prior to the imposition of the current temporary orders, you attempted to use a written psych evaluation, and the court accepted that evaluation without any expert testimony in support thereof, and ruled against you anyway, then you would need a new evaluation by a different expert, because the court cannot consider evidence already in the record from a prior hearing. That's just due process, and there's no getting around it.
The goal of the new expert would be to counter any prior considerations of the court re your exhibtion of odd behavior or overly litigious conduct (which admittedly is an absurd ground upon which to determine custody orders -- but, the judge is playing games with the law so as to try to send a message to you that you're not in charge of the proceedings.
So, regrettably, you will have to yank out your wallet, unless you know a colleague willing to go to bat for you without charge.
Hope this helps.