Please help me out! Stress or anxiety?

When I was 17 years old. My mother & father had a very big fight and hence after that my Mother was living with my maternal family. I was alone for the first time ever. I was also scared of my father hence I didn't tried to reslove conflict between them. At that time I was very brilliant in studies and I was also fallen for one girl. I used to miss her. But I felt that this feelings may distract me from studies. Hence one night I clenched my teeth on each other very hardly and then suddenly I heared some voices at back of my mind. It was the first time in life that I had experienced this wired. From that day I felt something is definitely wrong with my brain. Also I was unable to control those voices for 2 years. I felt that if I chatter some voice in my mind then my brain will be healthy. Now I want to know that what was wrong with my brain at that time? Which Psychiatrist condition I have.? Why did I heard those voices? was it due to stress or anxiety?? Please tell me Sir/Mam.