[songbird516]

I wouldn't space them too closely together; that's just asking for trouble. I don't know your reasons for wanting them close together, but I would examine the risks of having another child soon after a difficult pregnancy. There are risks for you and for the new baby. Generally 2.5 to 4 years apart is known to be best for the physical health of both. I think that child spacing should be based on that a lot more than "they will be great friends, etc.." (not that that is your reason; I've just heard it a lot).

Also I would read the book "Real Food for Mother and Baby". If you want to have the best chance of a healthy pregnancy and baby, nourishing your body optimally is really important and will give you your best chance for everyone to end up healthy.