Hi there. What is it you are actually afraid she had on her hands and passed on to you?
Like a std risk but I know It's no risk at all I see from touching or getting a lap dance but my mind just keeps wondering.
Have you been formally diagnosed with OCD or some kind of health-related anxiety? If so, have you had treatment? You mentioned "going through this stuff again" so I was just trying to see where you are at in your life.
If you have never received formal therapy, I highly suggest it. You have obviously developed some coping skills along the way. What you have to remember is that this is a 'been there done that' thought that is not unlike any other thought you have had. When stress levels increase thoughts increase and even those that you thought you had put to bed resurface.
Tushar has recommended a book for people with Pure-O OCD and it is called Overcoming Obsessive Thoughts: How to Gain Control of Your OCD by Christine Purdon. Why don't you check this book out and see if it is of any help to you.