There is something wrong with my glider. Female 9 years old. I am not sure what is going on but I think she may be having difficulty going to the bathroom. Crouched down and hissing. Lifting tail. She was also pulling at her anus. How emergent is this. I’ve called everywhere and the closed place is 3 hours away. I’ll definitely make the drive if I have to. There may be some vets in my area tomorrow morning that can see her. Im just not sure what to do.

Yes, this is an emergency. She could start chewing on herself if she is having enough pain to be pulling at her anus.
Pull up the skin over her shoulder blades to see if she is dehydrated. If it goes down real slow she is dehydrated and that will cause constipation.
Offer her water and juicy fruit like watermelon and grapes.

I would have her checked for a UTI and parasites. Please get her in as soon as possible.

I agree with Feather.