When I had my first baby, 18 years ago I suffered from awful pp depression.I thought I would only have one child, because I couldn't stand the thought of going through the depression again.
My husband convinced me my son needed a sibling. So we got pregnant again. I know how you feel, and was very uncertain throughout the pregnancy.My doctor reassured me that he could put me on anti-depressents straight away and I wouldn't have to suffer a second time around.
I am happy to say that I never needed the anti-depressants. I never got depression the second time around and the baby, another boy was such a sweet little delight, that I have since had 3 more!
Try not to worry (I know - easier said than done) I have never regretted having my children, despite being so sure I should never have another after my first. When you see the reaction of your first child to the new baby, it really does make a difference.
Wife and mama of five , Alfie 12/10 and Louie 6/11, CP5/12, CP 3/14