Hi I Am Queeny I Have A Occipital Mass Since

hi i am queeny i have a occipital mass since i was a child,below the right of my head near at my ear. It is Its movable.Now that i am pregnant my doctor told me that it can be burst out during my delivery since it slightly turn to big compare to past,she highly suggest that i'm going to undergone surgery tomorrow since 5 weeks from now im gonna burn my baby .now i am asking your advise if i would continue the operation for tomorrow?is it possible that it can be burst during my delivery period, cant be harmless to my baby?or if i gone operation tomorrow cant be affect during my delivery period since its nearer to date of delivery?