Thanks for sharing your concern.
Tooth pain arises only when the bacterial invasion occurs and it reaches to dentin
and then to pulp.
After reaching pulp it causes inflammation and infection to your pulp tissues.
Sometimes periapical infection and abscess
is also seen in chronic cases.
Therefore i would suggest you to visit your dentist
soon and get the concerned tooth examined.
So that it can be well diagnosed and suitably treated,without excessive damage due to self medication
Lots of pain killers have diverse side effects too.so please avoid them on regular basis.
Hope it helps.