If I were in your shoes, I would see if I could find other former Mormons and talk with them. If you have a close non-family Mormon counselor/friend, I might talk with them too. I would maybe write out what you are thinking and feeling, get you thoughts, feelings, doubts, questions, etc. clear at least in your own mind so you are firm in what you do know/believe so you do not get swamped by others responses to you when you tell them?