Meet your husband and iron out the issue f2f. Tell him if things are not sorted out, you will choose go separate. Let him know that you are serious. He can be a filial son and a doting husband. Is not an either or thing. Another viewpoint is you suck it up and accept who he is, his character and work around it. Since you are preggy, there's a good chance the hormones are messing with you and hence the negative thoughts. If you are going ahead with the separation, are you prepared to be a single mum. Not its just not you and your husband in the picture, but also a child. There will be much more issues to communicate about after the child is born. If you love him, and he loves you, sit down and think what is for the best. Give and take is the long way to go in a marriage.