Feeling called to be a surrogate

As a Christian I want to be faithful to God and follow the callings he has for me. But being a surrogate would be a huge deal! My husband would definitely be hesitant for a few reasons. I would also be worried to sacrifice so much for a child who isn't mine (I didn't love pregnancy and birth can be dangerous) Sounds selfish but it's how I feel. I fit all the criteria but am not done having children of our own yet. Does anyone know anything about surrogacy. I'd love to hear some personal stories.