My dog cant stand up?

ok here's the history. she is 12 years old about 3 months ago she was put on thyroid medication and pills to lower liver enzymess. we don't know whats causing the liver enzymes to be high. the vet said one problem at a time. her abdominal area is bloated as well. today she can't stand up by herself and if she does with help, its for a couple of seconds then she plops back down with frog legs. the vet is closed and wedon'tt have money for ER visit where they rip you off. so whats going on? what should we do? is she ok till monday?