Hole in tooth... please help:(?

This tooth can most likely be saved if you get to a dentist quickly enough. The sooner you go, the less damage will take place. There are many people such as yourself who have phobia of going to a dentist as I am sure you already know. Fortunately, dentistry has evolved a lot. I would look for a sedation dentist to help me with this situation. You want to condition yourself that going to a dentist could be a pleasant experience and sedation dentists can help you with that.