Should i cheat on/leave my pregnant wife?

My wife is 6months pregnant with our first child a baby boy. Well i have been thinking about and contemplating leaving her for a while now or just cheating because i am just fed up. I am tired of her treating me like chit and i am tired of her yelling and screaming and saying extremely hurtful things to me. I don't give a rats azz if she is pregnant or not it doesn't excuse or condone her treating me as horribly as she has. I just don't know what else to do i have tried talking to her i have tried counseling with her tried even having family talk with her she wasn't like this before she got pregnant. Like i said i don't care if she is pregnant or not still doesn't excuse what she has been doing considering i get the feeling women will side with her regardless. What should i do? Advice?