I would suggest that you go ahead and start working with an attorney- don't tell him about it- just do it.
My attorney had me change my will, get my valuable personal belongings out of the house (took to my sister's house), etc.
If you think it may get ugly, do what you need to do to protect yourself - keep it on the down low if you need to.
I didn't tell my husband until after my attorney had already filed the paperwork.
Second, your husband cannot force/make you leave the marital home that you share. He doesn't have that right.