About my Hole in my heart?

Well , when I was six , and in the first grade I came down with the 'flu'. I was throwing up , and had to stay home from school for what seemed like a week....I remember one day I told my mom I was going to go to my room and walked into the kitchen...I was losing my memory..my mom noticed and asked if I was ok..I lied and said I wanted to get a snack real quick. Then I made a map of the whole house so I wouldn't forget again. I slept in my brothers bed , and I was sad so I yelled at my mom to get him , after a few minutes I still didn't see him so I asked mom where Taylor was , And she said "he's right here Hun" but my vision had been lost , I didn't see Taylor , and my mom was starting to get blurry. Later on another night I was lying in bed and my mom came in...I didn't know who she was and was yelling at her asking who she was , and saying "YOUR NOT MY MOM!" And then later that night I had a stroke..at six. My Vision and hearing left , and me being six , I was freaked. My parents drove me to the hospital and the whole way there I screamed at the top of my lungs , yelling that I was being kidnapped , that my parents didn't want me anymore so they were giving me away , and I got even more frustrated that they wouldn't talk back...when I was the one that couldn't hear...so at the hospital they transported me to another hospital on an ambulance. I regained some of my hearing , and was screaming at it to shut-up..yeah I was feisty XD , and when I got to the hospital I got my sight back , I was yelling at the doctors saying "Don't touch me I'm fine!" the last thing I remember is laying down , and a doctor saying "Relax your arm , this won't hurt a bit" and getting a shot...the next I know I wake up in a hospital bed , its morning and my moms on the couch telling me to go back to bed...I do. And when I wake up a doctors there..I couldn't sit up or walk..I was to weak. But besides that I was fine. At first they diagnosed me with a mental problem , where something was wrong with my brain....but eventually found out that the germs that are on top of my skin some how managed to get inside me , and got to my brain , causing a stroke or something...and that I had a hole in my heart (Specifically my Mitro-Valve) I had to stay at the hospital for a month. And had my birthday there , it was on my birthday that my dad called to sing happy birthday while he was on the way to the hospital , when I answered i couldn't hear anything so I switched to the other ear and heard the ending of the song...so I found out I was deaf in one ear....I was never born with the whole in my heart , it just appeared. The doctors have no clue how...is this a rare case? I'm 12 now , but I'm curious. I'm not on any medication anymore , yet I still have it. I go every year for check-ups.