Hello OP
We are really sorry you are going through this. Have an unmumsnetty hug from all of us at HQ. 
We hope you don't mind, but when these threads are flagged up to us we usually add a link to our Mental Health resources - here. You can also go to the Samaritans' website here, or email them on [email protected]. Support from other Mumsnetters is great and we really hope you will be able to take some comfort from your fellow posters, but as other MNers will tell you, it's really a good idea to seek RL help and support as well.
We also like to remind everyone that, although we're awed daily by the astonishing support our members give each other through life's trickier twists and turns, we'd always caution anyone never to give more of themselves to another poster, emotionally or financially, than they can afford to spare.
We are just going to move this thread over to Mental Health.
Thanks