Don't be scared she is going to get through the heart surgery and amaze everyone.
She is going to amaze you with how much she can do. She will do so much more than the experts tell you she will do. I would tell myself that I am stronger than I know and that she is stronger than I can ever imagine and we will all be alright. I would tell myself that you will love this baby girl more than you can possibly imagine. She will teach you to love better to hug harder and kiss longer. She is going to change your whole world as you know it and make it even better. You will appreciate how precious life is. The road ahead might be scary because there is so much more that is unknown but don't worry about what you don't know, just love her and she will love you back. Enjoy life in this very moment, enjoy each one as they come and cherish them.