Hey, believe me I feel your pain! Tooth pain is the absolute worst. Yes I've only had the 1 root canal done, if I remember right I had to go in for 3 or 4 sessions, each lasting about 30 minutes. Next week I'm going in for 7 extractions plus sedation for a total of $1000, so I'm gonna hold off on the crown as long as possible..The dentist told me the temporary filling will last about a year, so I'm probably waiting a couple more months for the crown. Hope ya find a good dentist soon and get that taken care of...let me know how it goes!