hello and welcome to HCM forum neb,
It seems you are quite worried about getting the treatment done, but i would like to inform you that you need not worry, your dentist(periodontist) will take care of your tooth, as you mentioned that your tooth is exposed as the gums have receded a little , your dentist will not extract your tooth, he/she will perform a minor gum surgery so as to bring back the gum at a normal level.
i will summarize the dental procedure quickly so that you are no more apprehensive about it;
1. local anesthesia
2. small incision over the gum(painless),
3. elevate the gum a little and then pull it back to cover the exposed tooth,
4. suturing the gum over the new position,
5. dentist will prescribe you an antibiotic medication,
6. you can go back to work,
7. follow up after a week.
i hope now you are clear about the procedure a little bit, just be calm.
i wish you good health,