Michael, if you had no open areas on the finger I am sure you are fine. I worked with people's body fluids for years in a medical lab and never contracted anything. And we didn't always wear gloves.
You may want to go to a doc just to check it out and give yourself some relief. Our minds can really mess with us. Every year at cancer screening time I just know I have cancer and I always end up okay.
I think the tension you are causing yourself is resulting in your neck being tight. Try to relax, put a heating pad on it or maybe let someone massage it. My own neck is sensitive to emotion. EFT sounds like a method you may want to employ in your life. It is very effective.
Best wishes