Mummy Guilt

My toddler is getting naughtier as he gets older. He is only 15 months old but the tantrums and mischief that he is up to,is driving me up the wall. I resort to hitting the bottom of his feet after repeated warnings on not to misbehave. My anger got the better of me and i hit him 6 times on his feet alternately because he kept kicking and screaming from not getting what he wants. My heart instantaneously ached. I feel guilty but at the same time I really dont want my son to grow up thinking he can kick up a fuss and he will get his way. I hate myself every time after hitting or scolding him. My heart breaks whenever I have to discipline him. Do any of you feel this way too?