Excellent Post Jenna.
I went to the Samaritans myself about 5 years ago and it was amazing to talk to someone who was completely neutral.
It sounds like you're having a bit of a cr*ppy time at the moment, I sincerely hope it works out.
The important thing is to get the truth out or it will destroy you. That you're talking about it at all is an amazing first step.
It will be difficult, there's no way of preventing that. It WILL affect your family.
I won't tell you what to do as this is something that my limited knowledge isn't qualified to do. All I can do is agree with Jenna and urge you to get to the samaritans. They listen, they never judge, they can recommend the right people to talk to, their buscuits are amazing and they make the world's best tea!
Its never too late to do anything about it....
Hope it works out,
K
x