Stomach growling, also known as borborygmi, is typically a normal digestive process that occurs when your stomach is empty or when food is being processed in the intestines. It doesn't usually indicate that it's almost morning or directly relate to bladder activity or stress.
If your stomach is growling and you feel an increased urgency to urinate, it might just be a coincidence of your body's natural rhythms or a sign that you're feeling hungry and need to eat something. Stress can impact digestion and bladder function, but it's not accurate to say that stomach growling signifies that the bladder is full or that you're feeling stressed.
If you're experiencing frequent stomach growling or urination during the night, it may be worth discussing with a healthcare professional to rule out any underlying conditions or to address lifestyle factors that might be contributing to these symptoms.