How To Treat Fluid Swelling In Legs?

Hi, may I answer your health queries right now ? Please type your query here...In june 2010 I had a thrombectomy in my right arm and a segmented mastectomy in my left breast for breast cancer. I have since been diagnosed with Prinz Metal Unstable angina and factor 5 Lieden positive. I am having swelling in my upper legs that is hard to touch without pitting. I also have obvious fluid swelling down my legs to my toes. I cannot seem to bring down the swelling in my legs. Can you make a suggestion to take down my swelling, I have tried elevating my feet, drinking more water and rest. Please give an idea what could be causing the swelling I am tired of it, it hurts and slows me down.