The first step is exactly what you've done - talk to somebody.
I suffered sexual abuse as a child, and let's face it, it's not something you can ever truly get over. That said, keeping such a huge burden locked up inside is not the way to deal with it, emotionally or otherwise.
Personally, I find it helpful to keep a diary and when you're feeling particularly down, write down your feelings. It helped me through some really dark times.
Without knowing exactly what has happened to you, it's difficult to know whether your situation is similar to that I experienced, but I truly hope you are able to find some kind of peace with what has happened.
I think you do need to realise that because you have kept it locked up for so long now, you will most likely struggle with your emotions for the next few weeks to months. After talking about what happened to me for the first time, it took me months. I think until that point I was half in denial it had ever happened and speaking about it made it all too real.
I also found it far easier talking to complete strangers - a telephone counsellor really helped me.