Really obese and pregnant

Sacnite • Mother of one adorable 7 year old gymnast 🤸🏻‍♂️ and fabulous expectant mother of a winter baby
Are any Mommas out there going through the same as me?! 
I was on a weight loss path when I found out I was pregnant with a miracle baby! (After doctors had told me I wouldn't be able to have more kids, I have a 7 year old daughter) I'm currently 6 weeks and 3 days pregnant weighting 305 pounds & 5'6. 
Has anyone else been in this same situation and still had a healthy pregnancy and healthy baby?! I am so scared to the point I can't even fall asleep just thinking that I will die during delivery or something like that! 
Please help! No harsh comments as I'm already dealing with all this nerves. 
Thanks have a blessed day.