Is Pitting Edema a sign of any type of a Cardiac Problem??

43yo, non smoking WF, no family hx except hypertension. I do not have high B/P. I have fibromyalgia, asthma, Osteoarthritis, chondromalacia patellae of both knees,gastric byp. I have edema in my legs from knees down. This keeps happening off and on. Right now it is really bad, the pitting is 1+/2+ and my R is esp bad, even my foot is swollen and you can't see my ankle! I wonder if that chondro would cause this? I ask about Cardio because ppl will see me like this and say "Has your Dr had your heart checked out?" Once a Dr did a few blood studies but they were normal and I dont know what it was. I havent injured myself, I am on several meds but I have been on these same ones for a while now. My PCP has tx'd this with Lasix in the past. I can go to the ER but dont know if they'll do anything since I dont have ins. . Please give me some answers and not just see your DR. I am an RN and I know this. I just dont want to go and it be normal with my knees.. etc.. It is really uncomfortable.