Situations like this will arise when regular dental check for every 6 months has not been done.. Gum disease leads to bone loss and  loosening of teeth.. cavities leads to tooth infection and severe pain.. You need to undergo thorough dental examination along with an OPG X RAY to clearly diagnose the the problems and treat accordingly.. Treatment usually include clearing gum disease with procedures like scaling/root planing/curettage/flap surgery and clearing decayed teeth with fillings/root canal/crowns etc. You may need removal of hopeless teeth and get them replaced by removable debtures/fixed bridges or implants bases on bone health/your preferences.

You need to visit the dentist and get it treated. Take a pain killer for now, like Tab. Durapain, if you aren't allergic to any medicines.

Patient's presence is necessory...