argh sweetie, I'm in the exact same position right now, I underwent surgery for cervical cancer in Feb, and I had a miscarriage a few years ago due to violence.
I wish I could give you a big hug, because my partner and I want children badly also.
As my partner said, I know what true pain and suffering is, and all I ever give back is love and understanding, so he thinks I'll be a wonderful mother, and I'm 100000000% certain you will be too.
Just remember, one day you will be able to tell your child that they are the reason that you are still here, because there is nothing more rewarding than showing someone the love you have to share at the levels that you experienced pain in.
And yes, my kitties never fail to make me laugh, or cry, and even when I'm curled up in the couch bawling my heart out, I've usually got a kitty curled up in my lap, purring loud enough to drown out some of my pain.
I'm with you sweetheart, chin up darling, because I can't give you a proper hug with your head down low.
xoxoxox