hell, you have take appointment with dentist and follow the dr treatment also you should not earn from your left side untill you get treatment better to discuss bit more about your pain whether it is having cavity and all
Next Steps
try to get digital dental x-ray and upload here so that I can in brief
Health Tips
do not eat from afffectd side
take little warm saline water gargling
take pain killer for while
thanks and regards Dr D.S.Rajput Pune