Fear of the dentist is learned, usually in childhood: after a bad experience, or from hearing about it at home. And what is learned can also be unlearned.
It's hard to do alone. It happens in the chair, next to someone who guides you, calmly and one step at a time.
Francesco has written a series of articles on dental fear and how to unlearn it.

It depends on what you need, and you know before we start: after the visit you get a written estimate, item by item. If there's more than one option, you get them all, each with its cost.