What should i do? i might of got a girl pregnent?

i just got a voice mail from a girl i used to f*** and she said missed her period and she thinks she pregnent. i havent talked to her for a few weeks so i thought we were done and she awlays took birth control after we had sex so she wouldnt get pregnent so what if the baby is nt mine. i dont no if i should call her back i dont want to be a dad im only 19 and have a job. would i be a doosh if i told her i dnt want her keepin it? my parents would kill me to so i need ur help please