Firstly i am so sorry you are in so much pain, it must be awful,one of the worst pains is tooth pain, you have my sympathy 100 per cent.

Secondly can you afford another opinion and to get quotes from two different dentists, i have been ripped off before by dentists,so check it out if you can.

Thirdly if you need a rather big procedure enquire about intravenous sedation , it is wonderful, you won't remember a thing, as long as you have good veins in your arms, you will be sweet,it does cost more , but if you are a nervous patient then it is well worth it.

I wish you all the best ,and that you can make a decision soon and be free of pain.