Cried for the first time in my life getting extrac...

Cried for the first time in my life getting extractions. Have been having work done with nitrous since age 9. 1st root canal at 12 yrs of age. Have major anxiety issues, was given a new dentist who would not turn the nitrous (I paid additional $81 out of pocket for to assure it went smoothly) up enough to make me comfortable. He wanted to give up TWICE and send me home in pain rather than make procedure more comfortable. I've NEVER had a worse experience. How do I find Dr Black again? He worked so well with me and helped me thru my anxiety. This "new" guy who was younger than my children, has actually scared me. I'm having major anxiety thinking about future appointment. I need someone with more experience who is more concerned about my comfort than "how difficult" I was making procedure by crying because I was FULLY aware and scared to death. Thank God he continued when I begged, otherwise I would be too scared to ever return. I was very happy with service prior to the change in dentists.