If the dentist is adamant about your condition, you may want to seek a second opinion from another dentist or go to your primary physician.
Thanks but the dentist is adamant its just traumatic I brushed gums far to hard few weeks back but still I think it should be gone by now
Well it depends on whats causing the trauma. If there's a sharp tooth or something else, it can cause chronic ulcerations in the area. If not, the best thing to do is to get a biopsy to see it under a microscope.