This Only Happens When I Sit For Long Period, My

this only happens when I sit for long period, my ankles and feet will swell up. I am 58 years of age, smoke a pack per day and I am apx. 60 lbs over weight. My height is 5' 7. I am not sure if this is something to really be concerned with just yet. I have crappy insurance so i don't want to go to the doctors office for a bunch of tests that i cannot afford. There is no pain or discoloration and it usually goes away if I elevate my feet.