my tongue is swollen and very sore... it happened after i used too much toothpaste and mouthwash the other day?

the other day... i got sever toothache. my tooth had been sensitive for sometime so what i would normally do when it was hurting was stick some tooth paste on it... or use my mouthwash. so when my pain suddenly got sever on saturday morning i kept using tooth paste to calm the pain down... every 10-20seconds. i went through 3 tubes of toothpaste and 1 bottle of mouth wash before i could see an emergency dentist.. and yes i had taken pain killers... an awful lot and they did not help! i had taken everything the pharamist said i could, but they really didnt help. so i had a temp root canal done and my tooth is pain free... but my tongue is swollen on that side and very sore. i can hardly eat. iv tried to have a look with a torch and there are a few little white lumps. but nothing that would make me think its causing all this pain. iv tried using salt water in my mouth but its not helping, also i have stayed away from toothpaste and mouth wash as they make it seriously sting. what can i do? or what have i done to my tongue? could it be from the mouthwash and toothpaste or perhaps a reaction to something from the root canal?