Accidentally cut triangular gum piece.

40 days ago I had my wisdom tooth ( tooth 48) removed by dentist. He said it was deep. Stiture removed did xray and sent me home, after 7 days stiture removed. 10 days later I accidentally removed triangular piece of gum between the ( tooth 56 and tooth 47) using my finger nail. It bleed for few seconds and then stopped. After 2 days it was paining and went to dentist for check he said it will cure gave me paracetamol+ acceclofenac tab for 10 days dail 1 morning. After that tooth 46 pains if I press on it with finger. Please 🙏 help. It also bleeds when I press that tooth. Went to dentist again week ago. They said it's healing and don't put pressure on it. My brain is anxious and always try to touch it with tongue or my finger. Checking on mirror again and again like 40 times a day. It don't bleed on it's own. Dentist reassures me it's because of irritation. I googlee symptoms and all I got answers ' CANCER' HELP.. I DON'T WANT TO DIE. Only a surgeon can help me. It's not fully gone.