Could you describe a normal recovery of this operation on a dog?

My six year old bichon got two large bladder stones. She was urinating way too often with too little results. Other than that, she acted lively and happy. When blood was found in her urine I took her to the vet and he removed the bladder stones. Now, four days later, she can barely urinate and her stomach is distended. She drinks water fairly well and eats fairly well . Her stitches are internal and the “scar” looks fine. Yesterday, the vet drove over here (he lives down the street) and said she was ok. She takes two antibiotics per day, can walk in the yard slowly and can (but does so rarely now) jump on the couch but I’m concerned with the few drops of urine output. Anyone think she should be doing better by now?