Hello there ,
Thanks for writing your query,
your clinical history suggests you are suffering from periodontal infection
that involves gums and the attachment procedure of the teeth.
As most of your teeth are capped you may have compromised gum health leading to periondontal infection.
It is caused due to accumulation of bacterial plaque
and calculus deep in the gum pockets and root surfaces of the teeth.
you may need to be treated by thorough professional deep scaling of gums and root planing of the teeth to remove all the irritants ,this will help in resolving the symptoms.
followed by a course of antibiotic and analgesics.
i would suggest you to go for symptomatic treatment at home like gargling with lukewarm saline water or antiseptic mouthwash like chlorhexidine
approach a dentist
i hope this helps ,