I ended up in the hosp. for a couple days.The doctor said I have a leaky valve but didn't seem concerned and didn't seem to think it caused my passing out.I don't have swollen ankles or any chest pain but I do get light headed sometimes when I exercise. I did have a incident about 4 years ago when I almost passed out while walking but got into a building and sat down and got a drink and rested for a while. I sometimes get light headed and have to stop when out walking with my boyfriend and can't keep up as fast as him.He has to stop and give me a break.Do I have to worry about exercising? Or is exercise actually better if I do it. Why the excessive urination symtom which I do have and have had a long time. How does this apply? Oh I did pass a stress test a year ago but the doctor has ordered another one.