Sorry you have had such issues with the two root canals. Bryanna and her advise is really good. I would go to an oral surgeon to have the teeth removed. I don't think it is good to retain the teeth that are causing the problems. The teeth can also cause other infections in the body, if the infection is not removed all the way. Your tooth is infected first, then it goes down into the bone. When the oral surgeon removes them, that bone under needs to be scrapped clean. It is far easier to live with a space, and have a bridge or other device put in that to retain that infection and all the pain that goes with it.
I sure hope tomorrow goes OK for you. Let your dentist know everything, and ask for a referral to an oral surgeon. Since these teeth were RC'd by him and they didn't turn out so good, I would seek that other professional. Just my opinion Lealynn. I wish you all the best tomorrow. ginnie