What great news Laura, congrats to you and your whole family. I know what a frustrating time it can be, as it took me and my OH 18 months before we got our BFP, and I had all the early worries that you had, it's only natural when you want something so much. Hope you have a happy and healthy 9 months.
P.S I was born on Christmas Day, and I was spoiled rotten as a kid, so be prepared!!