Nervous/excited

Going to my first appointment tomorrow It’s just my confirmation appointment, but I’m excited. My fiancé keeps telling me not to get too excited yet, which is making me nervous. He and his high school girlfriend had a miscarriage. They were barely 18. So, he’s a nervous wreck, and it’s really stressing me out. I know it’s early, and miscarriages are possible, but I don’t want to dwell on the negative. I want to stay positive and hope for the best.