Swelling in legs!!!

I'm only 8 wk+3 and I'm a nurse, I work long hours and am on my feet all day! I have been wearing support Ted stocking for years to prevent varicose veins and pain in my legs, since being pregnant my right leg is swelling so bad, by half way through my shift my right leg and calf is so swollen, in so much pain!!! Anyone else have a very physically demanding job on your feet all day experiencing this so early on in pregnancy?