Coping With Mitral Regurgitation

I would like to know if anyone else might have developed this after handling “peroglide” for their horse with Cushing’s disease. I am convinced I have 3 leaky valves because of this. My vet gave me a 6 month supply for my old pony with Cushing’s. I am a 58 yr. old 130lb woman who is extremely athletic with no other health problems. All of a sudden I am weak or fatiged easily with chest pain But the heart racing or just stopping is the real bugger. I was about to lose my mind. I thought I was dying - it is terrifying. I have a medical background and could not understand what the heck was happening to me. I had a kidney stone removed and a heart doctor said I needed to get checked out. But I didn’t and just chalked it up to stress of being a caretaker of my mother who had a stroke I have been to hell and back with doctors who could not find anything wrong. I have had two heart caths with the result being I have the heart and arteries of a triathalon runner. The last doctor they are not that bad and don’t worry about it. Yeah right! Talk about changing your life! Anyone else?