panicking

suddenly the realisation of actually having a baby is dawning on me.. so much to do and so much work.. I know I'll love my baby but never imagined myself having a kid at 23.. my family are so excited but I can't help feeling my life is ending, my career has only started in the last few years but I'm marked as high potential in my company and that's all going to change now :( how can I keep my dreams and ambitions alive and stay true to myself while going through such a huge life changing event?