I believe you are fine. Infertility is not a sin. you should not make your life hell because of it. People have been making their lives hell. They should not do that. This problem is given to anyone by God. It is not in the hands of a human. But humans have made certain advancements to help them solve their problems. Surrogacy is one of the solutions. People who have been through it are now happy. My friend is infertile. She was unable to have her own baby. She came to know about surrogacy. She went for it and now is having a baby boy. I have never seen her much happier in my life. She and her DH are happy. Their life is now full of joy. Hope you choose what is best for you.