I wish you had not had the first C-section, it is not as healthy for the baby. But once one is done then you are kind of stuck with requiring C-sections in the future. At least make sure you breast deed since this will help counter the health issues presented to the baby from being born through a C-Section.
As far as the antibiotics go this is a surgery so you will need something to help prevent a serious infection, especially considering how many pathogens a person is exposed to in hospitals. But I cannot advise you to not take pharmaceutical antibiotics. That is a decision you have to make. What I can say is there are alternatives such as chaparral and andrographis if you choose to go naturally. Or if you opt to go with the pharmaceutical antibiotics you can use kefir and prebiotics to help restore the system afterward.