I have a mami friend who preg when her elder son was only 6 months old... similar situation as you... she also thought of what you said now... and finally she continue to preg...
now her small girl is 16 months old and stay really good, healthy and beautiful....
add oil la...
as many mami said here... including me, children are the gifts from GOD... many women in HK can't preg coz of unknown reasons...as GOD gives u another baby... it's a special gift lor...
just like me, when I first noticed I was having twins... I was really shocked... coz I have a boy already... but afterwards having cooled down and pray... twins are the gifts from GOD (as not many people can have this chance)... and so... now they are 5 months old.. and although I'm really tired always, very happy reward after looking at their smiles...
I'm very very difficult to have baby again after the surgery.
I so envy you have the luck. so, pls treasure the little life if you don't have too many pesonal/ health problem. :-P