you can speak to the samaritans online i think.
i have run a self-harm website for years. that site, plus all the many other SH and other mental health sites I know of do not allow these kinds of posts, for all the reasons below
it's fine to ask for help. it's fine to say taht you're at the end of your tether. you don't have to go to this extent.
it's fine to say you've thought of suicide. but threatening to do it right now is just silly. isn't it?
the metanoia page someone linked to below is VERY good btw, if you haven't looked at it already, we have that linked from my site.
but there is a limit to what people on a forum can do... we aren't rtained counsellors, we can't tell you what you need to hear..
this is the samaritans website