Is marriage counselling helpful?

So I never thought I would reach this point where I think about marriage counselling just after 3 years of marriage. We had a great marriage almost perfect until last year. We both have strong love for each other. This last year has been bitter to say the least. My husband has a dark side to him he is controlling and a child when we argue. It seems as if he doesn't know how to handle fights and end up having the worst reaction. He is so stubborn and hardheaded to the point where it doesn't make sense. Now that sounds like a horrible husband but he is not. And that's the problem. He's 99% great until he decides to shift to his dark side. If he wasn't a great husband I would've left long time ago but the majority of the time he's great and that's why I'm seeking help. I don't want to lose him or give up on this marriage just yet. But now my love for him has changed and our marriage is suffering. I started to think about counselling because I noticed that he tends to accept people's advices so I thought maybe that will help. The other reason I'm thinking about counselling is because unfortunately we have reached a point where I think he's wrong and he thinks I'm wrong and that I'm the controlling one. So it's a dead end in my opinion. I'm also 21 weeks pregnant so I really want to work things out. But I would like to know maybe from people who have tried counselling if it actually help and I would like to hear about your thoughts on marriage counselling. I don't think my husband will refuse to go so that shouldn't be a problem.