We woke George up today after his 12 week (first) hibernation. I followed the care sheet advice, his eyes, nose, mouth, ears, shell are all clear and look ok, he had a long soak in the bath and had a drink but didn't urinate. I warned him up under the lamp and he has eaten and been active all day. He had another soak in a luke warm bath but still hasn't urinated. I was expecting him to expel fluids after waking up, should I be worried? 

No.