The biggest struggle of my life so far...?

I am 22 and of Indian decent. In my culture and family, you are only deemed successful if you are in the science field doctor, dentist, pharmacist. i am not really interested in those field but was premed all through out college. I am a typical leo and am a hard worker. I put everything in what i do and i need to do WELL. In college, i did not do as well in my science cles getting mostly B- 's in them. My self esteem took a huge blow and i felt like crap. I double majored and also studied psychology. I loved me psy cles and excelled in them (granted they are much easier than harder sciences). I am very interested in psychology. I love to yze and understand human behavior and thinking. I want to get my ph D in psychology. Every time i make that decision i go back to being premed cuz i feel like CRAP about being a disappointment and a failure. My parents gave up their entire lifes for me education and now i am not going to be doing what they though i would. I easily feel saddened by all that and stay premed but than me mind wonders again. How do i stay content in one desion, how can i resolve this issue that has been HAUNTING MY THOUGHTS HEART MIND FOR 5 YEARS? How can i make my parents happy and myself? Anyone else been in similiar situation?