Sorry, I feel as an adult I should already know the answer to this but here’s a bit of a back story...
During my pregnancy with my youngest I had (HG) which basically meant I was throwing up all day. This inevitably led to me getting issues with my teeth which didn’t arise apparently until some years down the line.
Dentist drilled out molar teeth on both sides but had to stop as I could feel them drilling. They put in temporary fillings and I had to return to try again... they tried and I could feel them touching nerves despite 7 shots of local anaesthetic! They put in another lot of temporary fillings and in disgust told me I’d have to be sedated if I couldn’t handle the process. 
Fast forward to today and I’ve not been to the dentist since, the two molars are still open cavities and I’m absolutely and genuinely petrified of going back and their attitude toward me.
Today one of the cavities has broken off below the gum line. I know they are going to need removing but as id need sedating, who would I need to see? A dentist? Private? Doctor?
I’m so disappointed in myself that I’ve allowed it to get this bad, so please don’t lecture me. I’m genuinely so fearful of going back 