Hi since your treatment has been very recent kindly check for high points of the cap. If the cap has more height this issue might arise while biting and chewing. If so get the cap adjusted and you should be okay. Start chewing on both sides evenly after, that way you get adjusted to the new cap and the bite is balanced. Also check for any wisdom tooth impinging on the 2nd molar causing pressure or discomfort.

Hello First go for Xray ,without Xray we can’t say anything.as per ur signs and symptoms may be high points are thr on cap,get it trimmed

Hi If u could attach x ray it ll be helpful to give u better opinion. After root canal treatment few patients will experience pain for 2-3 months and it ll resolve by itself. The reason for the pain could be because of:- 1) Food lodgement around ur cap (gives gum pain and discomfort) "floosing" that area will give u relief.Dont use threads or toothpick to remove any food particles which is stucked.Use only Dental floss 2) Post endodontic pain.(will resolve by itself) 3) High points.(Get it checked n corrected)