Leaky Valve

I am 28 years old and I am very active...I have always had symptoms of feeling fatigue, shortness of breath, palpatations, dizzyness, lightheadedness, usually have cold hands and a history of migranes (migraines). My doctor decided to send me to a cardiologist. I had a stress test, 30 heart monitor and and bubble study echo. After the bubble study echo the cardiologist wanted to give me a Tee echo-She said I had a leaky valve but none of my symptoms are correlated with a leaky valve-she said my only limitation is that I shouldn't go diving below 50 feet-Well I don't dive anyway--When I asked what this condition was called she didn't give me an answer, but when I look up leaky valve symptoms on the internet-it shows ALL of my symptoms. She gave me a prescription for metoprolol for palpatations but that's really not a big deal for me-The dizzyness, fatigue, and fainting are the biggest problems that I would like answers for. I don't know why she would prescribe me a bp med if my bp is low anyway...I guess my question is what are symptoms of a leaky valve EXACTLY and do the symptoms I have are in fact leaky valve symptoms?? (she didn't tell me what valve, all she said was it is seperate when you are born and it's supposed to fuse together but mine didn't all the way...she gave me no name to look up or anything) Please help!!!