Hi lovely mamas & mamas to be!

I'm currently 9 weeks and 3 days pregnant with my second child. As much as I want to be excited my anxiety and fears overwhelm me at times. Even though I have given birth before I am so afraid this time around that I will die during childbirth and leave my husband and 4 year old son behind. There have been nights where I just cry thinking of the worst! Do any of you ladies have the same fears? Does it sound crazy? If so, how do you deal with it? Are there any books to help with thinking more positive? Thank you so much in advance.