Yes those circular marks on her belly are "Stress marks" I wouldn't worry too much about them as they don't exactly signify a stressed out beardie, there are many, many reasons a beardie will show those marks... IE Cold, hungry, tired, don't like the shirt you are wearing, don't like what's on TV ect lol
As for the urine... Did you notice a white part to her stool? that is the way Bearded dragons urinate... Much like a bird they process liquids a little differently and they expel a chalky white substance known are "Urate" or Uric Acid" If you see a beardie passing water during a bowel movement, it's usually just excess water in their body... and a sign that your beardie is properly
hydrated.