hello and welcome to HCM forum,
according to the history of pain presented by you it seems to be a carious tooth with peri - apical infection
.in such cases, root canal treatment
is the only solution. i would suggest you visit a specialist,i.e an endodontist, who will perform a RCT for your tooth and treat it .
this will resolve the infection and relieve you from all the symptoms.
amoxicillin+ clavulinic might not be sufficient for the present infection therefore you dentist
will prescribe a broad spectrum antibiotics,
do not consume hot food as this might spread the infection,
kindly believe in your doctor ,and you will surely have a painless tooth.
i wish you good health.