Its good that you are letting all this out, hopefully that will help,even a little bit.

Its wonderful your self aware, but total suckiness that your being triggered

Is it possible for you to talk to your husband about the reality of having another child right now, I mean your still trying to manage your marriage, your child , your job and just your life in general.. His even talking about expanding the family might be a a background trigger that is going to worry you. Your plate is full atm.

I am sending lots of healing energy your way. Hang in there girl