Talk to the dentist you're condsidering using about your feelings, including what you said in your opening post. Evaluate his "bedside manner", which is often as important as his technical skill.

Be aware that many people have strong emotional reactions to going to the dentist, speaking (formally) to a group, even taking the car in for service. Sometimes you just have to push yourself way out of your comfort zone to accomplish certain goals. The goal here, as Sorcha mentioned, may be saving your life. Give that some long thought.

It may help to promise yourself a treat as a reward for doing it.

It sounds like it should be easy, but for some of us it just isn't. Still, it's possible, and I have faith that you can do it. We're behind you, and wish you well.