Teen daughter- mom has new baby?

Emy

I had my first daughter at 17.... when she was two I had a still born, that was a VERY rough time for me, I was all alone and a single mom... and it took a long time to get to where I am- but I know I’m ready....

Fast forward to now- me and my husband of 3 years are trying to have a baby.... I’m nervous and scared of how my teen will truly feel about being 13 and maybe a big sister? I know she is ok with the idea- we’ve had conversations about it but I feel like the age gap will be difficult for her and I want to be able to help with the transition and her feelings- however, I can’t find anyone else with any advice or experience in this... can anyone help??