Why am i so nervous about this birth?

ok i have 2 kids now, and this is gonna be my 3rd, i also have 2 step kids, but the main thing is here within the past few days i have been pretty stressed and nervous about the birth, i am scheduled for the 13th of january for a repeat section, and i dont know if i want to go through with it, lol i know its to late now, but i am liek really scared this time, its like i worry will i be ok its my 3rd section, is it really safe? and also with another kid i dont know if i can handle it, somedays i am so drained from the kids its like man i dont know if i can do it, my husband is a trucker so he is gone alot and i dont know if its nerves getting to me, or just hormones, or what, maybe a little reasurance