Wanting a Baby

Tierra
So I've been told by multiple doctors that I couldn't have kids. 
And it's breaks my heart. I see everybody having their own bundles of joy. My husband says we'll have our one day. I know he won't spare no expense when it's time. But I want one now.! He feels as if I'm not ready became of health issues the doctor has given me the okay clean bill of Health but my husband is super worried about me. I understand I do. 
I feel as if I'm missing something I see everybody else around me moving forward with their lives in enjoying being parents and I don't have That I even watch my sister have a baby. I love my niece don't get me wrong but I just want to child of my own..
how do I convince my husband that I can handle a baby. my health is perfectly fine. 
Only positive thoughts and positive feedback