Pain in root canal retreated tooth.

I have jaw pain under ear and neck(only right side) since May2020.Dentist said tooth 46 hurting for tapping and biting pressure on it. So suggested root canal. Did rct by Endo in Sept 2020.No relief.Same tapping and biting pressure on it.It hurts for any little pressure on it.Taken cbct before and after Rct. Nothing found evident. 46tooth&gum hurts for brushing on it,touching with tongue,pressing with fingers on it.Hurts sore constantly in the gum and tooth.Constant jaw pain under ear and neck.Dentist suspect this tooth is the reason for jaw and neck pain.  Went to new Endo.He said there is some dead space unfilled in distal root and asked to retreat that root. Retreated that root and he filled with medicine.He said he put calcium hydroxide.Told me I should get immediate relief. It's been 5 days&taking ibuprofen every 6 hours. No changes in the tooth pain. I am using a very soft bristle brush. Tooth and gum hurts for brushing. It hurts if I touch with tongue. Hurts even not touched.