Hi!
I am very sorry.
Could you see an out-of-hours or 7 days a week vet clinic today? Puffing up and hunching over are pointing towards an internal source of pain somewhere in the main body/the major organ/spine area in my experience.
How to contact a vet out of hours
Emergency Information and Care
Other than that, all you can do is hang in there until tomorrow morning.
The bright orange urine is to my knowledge (but things may have changed in the meantime) caused by an overgrowth of relatively harmless bacteria that are normally found in a bladder and kept under control by a full working immune system. It is a secondary complication and not a primary cause of problems; it is more often seen in the wake of some major issues with the bladder.
PS: Sorry, I am not well today myself and won't be active on the forum.