I want to have a baby, but don't want to give birth for health reasons. Could I have a surrogate?

I have suffered from depression & anxiety and other emotional disorders all my life, and due to all the changes the body/mind goes through, I'm afraid that I just can't handle a pregnancy. This is not by any means a vanity issue, but one where I fear that I won't be stable enough mentally/emotionally to handle the physical & emotional trauma of a pregnancy/giving birth. Do I have to be infertile (I am not) in order to have a surrogate mother carry my child for me?