shamrockerin, there's a lot in your recent posts that I can relate to! You're not alone
shamrockerin said:
It's kinda funny to me that my parents forced me into going to the dentist my entire childhood, and scolded me whenever I 'misbehaved' (aka was terrified and panicked) there, yet they never seemed to care what I did w/ my teeth after I turned 18.
They never really asked if I was still keeping up w/ appointments, or if I even knew any dentists in whatever area I happened to be living in at various times. My mother recently said casually to me on the phone that I should be "taking advantage" of my dental insurance (which is free from my school job). . .she has no idea what just hearing her say that did to me.
I don't think they ever understood that I was actually terrified, and that I did have some terrible experiences, and that I'm not able to just 'get over' it.
I have never told my parents that I still struggle with this phobia because if they didn't understand then, I doubt they would now.
My parents really don't get it either - they have no idea what's going on now with me and dentists. When I was young I was always taught to "be good" at the dentist, which basically meant shut up, do what you're told don't make a fuss. I pretty much managed it as a child, since the stuff that caused my phobia came much later, but it left me with that background feeling of "it's supposed to be horrible, and what you are supposed to do is suck it up and deal with it.
Do not under any circumstances make a fuss" that I'm still trying very hard to shake.
I had a very bad experience with a dentist a couple of years ago (very short version: the local anaesthetic failed, but he bullied me into having a deep filling anyway with the tooth not numb). After it happened I told my Mum, who said sympathetically "it's not traumatic if they're not wiping blood off the light at the end!"

Later on, once I'd found a good dentist and realised just how out of order things were before, I made a complaint about the bully. My Mum's response to that was "How is you being mean to him going to help? Two wrongs don't make a right you know!"
I think there are sometimes things where your parents are the last people who can understand. Even if you have lovely parents who you get on well with, which I do! Happily my husband gets it, as does my new dentist. I'm glad to hear your therapist is supportive too - I've come to the conclusion that it's best to discuss this stuff with the people who Get It, and not with the people who don't. They can bring you down, even if they don't mean to...even if they are your parents (come to think of it,
especially if they are your parents!)
shamrockerin said:
I don't want to you tell me that you're willing to work w/ me and then lose patience with me someday.
I can really relate to this bit too! This is exactly what the bully did to me, he switched personalities on me and suddenly became grumpy and impatient. This means that I'm still waiting for my new dentist to do the same, even though all the indications are that that will never happen and two different people who have known him for years have assured me that he only has the one personality...
Last time I was in I actually managed to tell him that, which helped a lot, and I'm gradually starting to feel that I really am safe this time and I really can trust him. He's been very supportive over the stuff about my previous dentist too, which also helps. It's a long process, and I guess it can only really be achieved by sticking around long enough to prove that it's really not going to happen.
Um, not sure how helpful I'm being here! I think I just wanted to say that I understand and you're not alone 
...and also to encourage you that there is light at the end of the tunnel, with the right dentist and the right support these things really can improve. I know because I'm in the middle of that process now.
The good dentists do exist, they really are out there, and they really are on your side! I hope this one will turn out to be yours 