Cardivas 3. 25 and nebicard 5. Beat?

I am having high blood pressure problem,fast heart beat and mild mitral valve prolapse regurgitation due to which i was given cardivas 3.25 by my M.D,but i started getting erection problem in this early age so i consulted a cardiologist on practo he changed my medicine to nebicard 5 which actually helped me and also didnt affect my sexual life,the cardiologist also asked me to contact him after one month but now he is not available Now i am scared that i have changed my tablet without consulting my M.D 1.Can i fall back to cardivas 3.25 or should just continue nebicard 5 which is also helping me? 2.does beta blocker also reduce mitral valve prolapse or is just for high B.P and fast heart beat? Note:i am absolutely healthy fit and fine now also and before also mitral prolapse was incidental finding Plz advice