I am sooo scared of going to the dentist but i know i have to!!
I have a whole in one tooth and a tiny bit of black inbetween 2 at the top. wondered on average how long would i be there for?
I dont want to have to ask my doctor for valium but might have to at this rate :(

It depends on the size of the cavity. Little ones can be quick, like say 5 - 10 minutes, larger ones may take 1/2 an hour. Don't be scared, it doesn't hurt and nothing bad will happen. You can ask for a pill to relax you and then it will be smooth sailing.