Go to a dentist and get the check up done.
There can be many complications associated with tooth pain. Do not self medicate, just go and see a doctor everything will be better once you are checked by a doctor.
According to the symptoms described by you, it seems like you have developed infection in your gums which can only be treated bye dental surgeon.
You have to visit a dentist and get the evaluation done. Accordingly the treatment will be decided depending upon the extent of damage. Oral disinfection is the only treatment of choice in your case. Will be decided by the doctor. Do not delay the treatment as it would make the treatment more Complex and difficult to treat.
MDS Endodontist, Fellow of Academy of General Education (FAGE), BDS
There are various options to treat your teeth such as tooth coloured restorations, crowns, veneers, orthodontic braces or aligners. Post a consultation everything can be discussed as the treatment plan depends upon the spacing between the teeth and the extent of slant. The best option to treat such cases are naturally without comprising on the tooth and that's through orthodontic intervention that could be either braces or aligners. But as I said post a consultation the treatment plan can be decided. Regarding your pain you need to get clinically evaluated to get the right diagnosis and then plan the treatment. Take care Keep smiling.
Kindly get an X-ray done of the tooth having pain. May be you will have to get root canal treatment done followed by a cap/crown. Brush your teeth twice daily using correct brushing technique to maintain your oral hygiene.