I can offer you the best advice I have ever experienced the other day. I had to go to the dentist for a filling on my back tooth. I hate the dentist at the best of times, and the thought of 3 injections, drilling and filling was making me nervous. However the way I got over it was by sheer fluke, I was desperate to go to the toilet, and I was touching serious cloth for 2 hours before, when the dentist had finished the treatment, I can honestly say I didn't even know she had started as I was concentrating on keeping the mole down the hole.