I agree with Leo, the only way to get a true diagnosis is from a doctor. However, some of it does sound like what I deal with, however I also have the compulsions. I think what you're asking is since this event from your past actually happened, does it count as OCD? That's actually a good question and one I am unsure of. Most of my OCD obsessions are based on false or unreal fears. I would definitely ask a therapist about it. I am not sure if an actual event that we obsess on would change diagnosis or not.