Hope today is being a little kinder to you.
Lots of good advice on previous posts. Please don't ever feel that you shouldn't share your worries and concerns with others, whoever they may be. I think it's when you clam up and don't feel that you can that things get really bad.
When my dc were babies my dp was frustrated that we couldn't get them to sleep better - as was I ! He kept wondering what we were doing wrong, could it be that hard etc. When we were out one day I pointed to the shelf in the book shop containing about 20 books on getting children to sleep. I said if it was that easy how come there were so many books about it?
The point I'm trying (clumsily) to make is that as a society we know how hard life can be at times, and you've obviously had your fair share. So why shouldn't you reach out to people and all those organisations that can help? It's a cliche but if you had a broken leg you wouldn't think you were weak in going to hospital, would you ? I've taken the offer of help in various guises over the years, I can't think of any of those that were unhelpful or that I regret.
I know how hard it is to move forward when you feel you've fallen so far. Just the effort of thinking straight can be exhausting. But you are worth so much more than the validation of others. Other people can love and support us, but we ourselves can only ever really be the mainstay of our lives. You know yourself better than anyone, you're not going to quit on yourself, you always have your best interests at heart. Initially I found this quite a scary thought, but now I find it a comfort and a source of strength.