Not struggling quite as much

[Twofeet]

Jim can she not use email, phone, or text to make her own appointment? She is texting you internationally can she not take care of it with the Dr. ?
Does she have an OM and is she on vacation with OM? If so then eff that noise.
If you and her are amicable co-parents and this is a favor she would return then I dunno maybe consider it. Otherwise tell her you will not be able to assist her with her medical needs and she should contact a family member to help her. She fired you as a H, would you help out our Er or a business partner one last time if they fired you?
Leave out all the rest of the stuff you mentioned it sounds petty. Keep it businesslike.
Just my 2 cents.