I've been married for only 7 months and my husband is giving me a lot of problems with my son. We are always fighting about my son should I get divorce

How old is your son?
How does it effect your son?
I take it he is not the father.
He should not argue with you or contradict you where your son can hear
It will give him the idea that he can play you against each other.
Like he sees mommy and daddy do not agree so one says no so I will ask the other

You need to be the one that ultimately makes the decisions
If he wants your son to have certain rules then he needs to set up the rules with you, away from the son.
Arguing with you and your son knowing it undermines your authority and will just make it easier for your son to eventually walk all over you especially if you ever do leave your husband.
Try working things out and coming to an agreement before making any drastic decisions

Have these problems started since the marriage or were they happening before the marriage?
How old is your son and what kind of things are you arguing about?