Hi! My Age Is 25 & I Am An Unmarried

hi! my age is 25 & i am an unmarried girl. my periods missed since last 2 month 1st time in life.my prolactin level is high. Gynacologist advised me to take Pills for periods and i m a physiotherapist so one of my dr. friend told me it will causes brest cancer..i just want to know about it will happen or not and if yes then what is the solution of that please let me know as soon as possible