op, do what feels right FOR you, yes your partner would need a say, but 1st ask him if he would be willing to put your body through the stress of pregnancy and child birth so soon after a c-section?
get him to think carefuly about what you have already been through.
my partner wanted a yr age gap between our children, but that would mean me getting pregnant when our daughter lily-faye was 3 months old, but i knew i physicaly and mentaly wouldnt beable to cope with it, so explained that to him, it took him a while to accept it but he did in the end.
to the others asking why it would affect her health....the op says that her youngest is only a yr old... she had he/she by c-section, her body therefore will need time to recover due to scarring etc, some doctors i have heard from reccomend you dont fall pregnant for another 18-24 months after a c-section due to scarring etc as some take longer to heal than others.