Suggest Treatment For Pitting Edema

Hi, I am 29 years old and have pitting edema ( most of the time in my lower legs but sometimes through out body) I can gain 15-17lbs from one week to the next. This occuse about 2 a week if not more. I seem to always have trace amounts in lower legs. I am overweight 200lbs but it is hard to know my true weight since it changes constantly. I also can t seem to lose any weight either. I am taking several meds. including powerful pain pills for hurniated discs in my lower back, nuerton, soma and progesteron for 10 (since I have stoped haveing my period for over a year now, and still havent).I do have the non-hormonal IUD for about a year now aslo. I am also on a heart medication due to high BP and Tacardia, which averages aroung 150/98 pluse100and up. My doctors are stumpted! So I thought I would give this a try...any thoughts or suggestions would be welcomed. It would give my doctors and me some path to go on. Please help. Thanks so much Robin