You sound like you are in a world of pain
I can tell you that I have been on medication to help through the really rough times, and it has helped me to stay centred and able to focus on the things I need to focus on, but if that is not something you feel comfortable with, fair enough.
The only thing I know without a doubt is that I am no help to my daughter, or my grandson if I am feeling completely lost and alone in this battle. The only advice I can give is the same that has been given to me and has worked well for my own sanity. Be good to yourself. Love yourself and look after you! No one benefits if you are not in a good place with yourself. We know with our children that some days will be really hard and we will have those frustrating and emotional times... . but the only thing I can hold onto is that I am good with me, and have faith in my decisions and ability to deal with whatever comes my way.
I have also started doing something that is totally for me. No one can take it from me, and I made a commitment that no one else can dictate my ability to do that one thing.
And surround yourself with people who love you and support you. From what I have seen so far, the people here are just that

Just sometimes getting things off your chest is the best therapy!