For the last 2 weeks my feet and calves have been swelling up and I can feel it when I walk what does this mean my feet feel like sponges?

There are multiple reasons for your legs and feet to swell and you should see your doctor to have some tests to see why you are holding on to the fluids. Meanwhile, you should cut down on sodium as much as possible and elevate your legs when possible. If you continue to get worse or develop any shortness of breath then you should go to the emergency room for evaluation.