buying formula for newborn

exactly 2 weeks from today is my due date, is like to buy some essentials cause who knows when she'll actually come! Should I buy formula?? I'm getting WIC but my first appt won't be until (hopefully) the say after we get home! so that being said I'm planning on using Enfamil Newborn premade bottles. how many should I buy? or what did you do?●●●●●●●●●●●●●●●●●●●●●● also, what did you buy for postpartum? pads and such? I'm at such a loss considering this is my first pregnancy and I want to buy stuff now! TIA!!