Thanks for asking the query,
Tooth coloured restorative materials are used for esthetic purposes if the cavities are too deep it can cause inflammation of the pulp tissue leading to pulpitis.
If sensitivity in the tooth occurs use to consumption of hat and cold stuffs sensodyne toothpaste can be used, if toothache occurs such type of tooth need to be treated with root canal treatment
I would suggest you to visit Dentist
and get checkup done, take an x-ray of the tooth ,this will give the periapical condition of the tooth.
As you mentioned you cannot visit the dentist right now, you can start with tab Augmentin 625mgand tab aceclofenac
twice all this for three days.
Maintain a good oral hygiene
and use chlorhexidine
mouthwash gargles twice daily.
Hope this helps out.