It Really Sucks

I had a root canal, (top right side) and crown added to same tooth. The crown seems to fit properly, but for some inexplicable reason front right quadrant of my tongue seems compelled to push against, rub against, and suck against this new dental work. Why am I doing this? My tongue is really irritated. I feel like im sucking my brains out. Any suggestions on help? Dentist thinks it may be a psychological thing.
PhucDup PhucDup
56-60, M
May 19, 2012