That is for sure therw is some problem and u r ignoring with ur carelessness. Just go to dentist and get ur x ray done. Without x ray it is difficult to predict what exactly the clinical situation is. Waise to that tooth should go for rct

Hello Visit a dentist for a check up

Please don't wait further visit ur nearby dentist before pain increases. As u said that u had got pain before too, make it a point to go for regular check-up already once every 6 months to a dentist so that they can diagnose any caries or any other problem at the earliest when it has just started and do d needful so that it doesn't cause much pain or any other problem at a later date

An X-ray is a must and then visit to a dentist asap.Warm salt rinses shall help and avoid chewing from affected side.