Oo normal yan, mama! A few of us who had CS before noticed the same itch on the scar area, especially when pregnant ulit kasi lumalaki ang belly at nagiging tight ang skin around doon. Since this is your third pregnancy after two CS, definitely check with your OB lang para ma-rule out kung infection or something else, pero most likely ito lang ang stretching ng scar tissue na nag-adapt sa bagong pregnancy.