I have had swelling in my legs and ankles for the past two weeks.? As well as shortness of breath ever so often. I was lying down in the tanning bed the other day and got extremely short of breath and had to flip over to be able to breathe. I went to the emergency room that night for the swelling and shortness of breath. They told me after they performed blood tests, that I was fine and just had edema. I didn t think at the time that I should have told them at one point I was diagnosed with borderline mitral valve prolapse. I didnt think it had anything to do with a heart condition. Well today I went to the doctor again because the swelling has been coming and going since then. It s not bad swelling, just mild to moderate. So in probably 2003 i was diagnosed with the borderline prolapse of the mitral valve. And I had an echocardiogram about two years ago while i was pregnant and there was NO sign of MVP. So my question is can this syndrome kinda go dormant. Or do you think there is something else causing this? I m so worried. I am only 26 and take care of myself.