Concerned that I'm unable to get pregnant!!

Leah
My husband and I are ttc.. We have never had protected sex. He has a child from a previous relationship when he we 20 hes 32 now. I don't have any and Ive only been with him. Since I was 17 till now being nearly 28 we have not even had a scare. But I'm scared!!! I want to be able to give my husband a family and I'm terrified Im unable to.....