Finally got a positive test: question for mothers

I finally got a positive test the other day :) I should be due in early December. Ever since I got the news, I've been very very afraid of something going wrong. This is my first pregnancy, and I wanted to know if this was a normal feeling. I've been scared that I'll do something wrong and have a miscarriage or I'll become too stressed out and have some sort of complication. Is this normal?