hello, the condition you had described seems to be deep proximal caries in your tooth with gingival polyp in the cavitated region.. its good that you are cleaning your infected tooth properly but you need to consult a dentist
soon... as your chewing on one side will harm your jaw joints.. your past experiences might be bad but now a days with lots of advancement in technology the dental treatment has become very comfortable too.. the treatment options for your tooth involves- removal of carious lesion , gingival polyp and root canal treatment
of the involved tooth .. you can take anti-anxiety
medicines prior to dental appointment or can also opt for conscious sedation.. dont worry about pain.. your problem will stop as soon as your tooth gets treated..
IOPA radiograph is needed to check for any periapical pathology that requires special treatment like surgery..
Root canal treatment is simple procedure where infected pulp within canals is removed, tooth is cleaned from canals and is refilled till the tip of the root apex..
dont worry.. meanwhile use antiseptic mouthwashes and brush twice daily..