Thanks for your query,
Actually there no problem in being pregnant but in your case there may be difficulty during birth if you want normal delivery. Otherwise CS is safe with no problems. In your case there are more chances of Cs because you have 2 previous CS . You can take baby till menopause
but the rate of complications increases for both mother and baby with increasing age like increased incidence of down's syndrome, maternal complications during pregnancy
etc. So better if it is early.
Hope it helps you..