My big baby

Hey you guys so I am 27 weeks & I’m due February 6th. When at my last ultrasound about a month ago I was told that my baby was big for how many weeks I was but not to worry it’s not a big deal that baby was healthy, buttttt at my last OB appointment about 4 days ago when being measured she said my baby was wayyy bigger than he was supposed to be & that she’s going to be keeping serious tabs on that. This is my first child! Has this been said to anyone before ? Will I be having him sooner than expected? C-section ? Any advise ?