What you are describing needs your physicians immediate attention. There are a couple of concerns that I would consider for you.
Both feet swelling with mild shortness of breath can indicate congestive heart failure. You will need to be examined for this and lab tests with a chest x-ray to determine the best cause of action.
LIttle urine output could be from a kidney or bladder infection or early renal failure connected to the congestive heart failure.
Therefore you really need to contact your doctor or provider without delay.