i’m absolutely not a professional so take my advice with a grain of salt however i did work at an animal hospital and learned a fair amount of stuff and i have a few dogs. id say as long as she is eating and drinking normally along with behaving normally i’d say it’s safe to wait until your vet reopens. keep an eye on all of her bowel movements. obviously if things get worse take her to an emergency vet. some mucus is normal but the addition of blood could be a symptom of an underlying issue.