So after seeing a bunch of random rubbish London dentists in my twenties, including one who gave me a filling, I had found a dentist that I loved and thought was fab, but he retired during lockdown 1.
I haven't seen a dentist since and had been having some very slight tooth pain - not enough to really bother me but enough to go to see someone.
The new dentist is close to our new house and it seemed logical to give him a try. He seemed fine at the initial consult - did an x-ray and said the filling from 20 years ago had failed and there was some slight decay behind it. He proposed removing it and re-doing it, said it was the best course of action - dangerous to leave decay untreated even though the pain was minimal.
During the filling appointment he was very rough, it was super uncomfortable just being in the chair and the way he handled my jaw and face - the gums and tooth were numb but the rest of me felt pretty mauled.
It's been a long time since the filling was done but I don't remember feeling so uncomfortable? At one point the dental nurse did a sort of gasp and moved quickly away which freaked me out. But he just carried on.
Afterwards he said that the decay had been quite deep, the nerve might have been touched when he removed the decayed area, and to take paracetamol and ibuprofen for a few days to keep on top of the pain. I queried it, saying the pain hadn't been bad enough to need medication before, and that's when he said: "it's normal for pain to get worse before it gets better after dental treatment."
So it's been 3 and a half days and the pain is keeping me up at night. I can't chew on that side of my mouth and can't drink any water from the tap as that temperature is too cold, the tooth feels super sensitive and sore. The pain is ten times worse than before I paid this guy £200 for dental treatment.
Is he right, is this normal? Or has he caused a ton of damage to my tooth and charged me for the privilege? 
If it's the latter one, what do I do now?
I'd really appreciate any thoughts, especially if anyone has dental training or knowledge! Thanks