I just want to ask if my case is serious. I had my 2d echo test and the result was positive to mitral valve prolapse. I had a history of sore throat infection that keeps on coming back. My doctor said that maybe i had this already 10 years ago. Can I consider this as a rheumatic heart disease? My doctor advised me to have inject every 21 days for 5 years to prevent for worst result  in my heart. Please help me to understand my situation. thank you.

Summarized question: What are the consequences of mitral valve prolapse?