Wow, sorry to hear about that. Hope you get better soon.
My father is a doctor, and he drummed something into me from an early age. Never ever let a dentist do any type of tooth extraction or other surgical procedure on you, including root canals. Always demand and go to an Oral Surgeon. Oral Surgeons are highly trained and specialized, and do nothing all day long but surgical procedures, so they know what they are doing.
The problem is that regular dentists are legally allowed to perform these procedures, and they rarely tell their patients to go to an oral surgeon (until they have botched you up and created bone infections. or worse.)