What would you do if...

So today I received 3 screen shots from my cousin from fb. They were screen shots of my husband's comments on a sex video posted by some random thot female. My husband post 9 min tops lol. The female replies I knew you were a quick pumper. He replies lls for u an hour nah I'm playin. After these comments another female replies to the video I can so do that lol riding is the best. To which my husband replies with eye ball emojis. The female replies no eyes. To which my husband replies with a mix of emojis that make me think of sex including the cat face, peach, tongue and water marks. Of course I went off. I'm 7 months pregnant with our first child. After anger, I was hurt, after hurt I was calm. We talked it out. I listened and I felt a little better but now he's not here. He went to work and the hurt is sinking back in. I texted him and told him how I feel. During our discussion I told him I forgive him but I can't forget it just yet. So now he is saying I don't forgive him. I'm hurting and I'm worried about the stress on our child but I've been in and out of relationships where I've been cheated on and even though it's just fb and he doesn't even know these woman it still hurts me like crazy. I just don't know what to do. Maybe I'm just looking for comfort. What would you do?

Update: so after much crying and yelling on my part and really getting down to the root of what I was feeling which was disrespected and secondary which wasn't even completely caused by this incident, my husband and I worked it out. I've never seen him cry and he actually cried. I believe that he made these comments without thinking and we discussed his decision making and him making me feel more important and appreciated. He even put his baby momma in her place this week. He is seriously trying to make up for his mistake. I've come to terms and decided I shouldn't run away for the first offense. He has never done something like this and before me it was a natural habit for him to flirt so I think it was a mistake. He has some making up to do still but I don't feel the stress I felt at first and we are going to move forward.