One thing to be aware of is that guys who do this are almost always repeat offenders. Keep that in mind.

One of the best treatments for Ptsd (Post raumatic stress disorder), which it definitely sounds like you have, is EMDR. It is used extensively by the Veteran's Administration. However, first off, you need to talk to someone about what happened--just to break the silence for yourself. There have been some good suggestions here about doing that.