Mrs. Tim. I think about everyone here can at least relate to what you're going through.
Me? Been there, done that, finally threw away the t-shirt.
I don't have children, but it was my cats that kept me from suicide - several times.
Sometimes we have to walk away from extended family to regain/maintain our own sanity. This is actually true of "worldly" people, too. My spousal unit, Kevan, had to walk away from his family for 3 years. It was with the help of a family councellor that he was able to reconcile. Unfortunately, with JW's there's usually no reconciling.
I'm estranged (strange?) from my own family - Adoptive parents and 3 sibs and their children whom I grew up with. Raised in the "truth".
I went through my own grief over the losses. There is a grieving process involved. But it's ok.
There has been some really good advice given here. Do find a therapist. Preferably one who has done work with cult or "toxic faith" issues. It will help a lot.
Do take care of yourself. You're family can't have you until you have yourself back. Remember, Jesus said
Love God
Love your neighbor as
You love YOURSELF
Right now you come first.
Hugs
Brenda