Flying with baby

I live on the other side of the country and last night my grandma has a heart attack and didnt make it..

I have to fly home with my 8 week old daughter tomorrow and Im scared shitless.

She hates any sort of carrier and sling too. I have to take two flights with a layover in one airport plus a shuttle bus to my home town after.

What are some tips at flying with a baby? Im already stressed as it is so I am really anxious about this trip. Its about 11 hours start to finish.