You are not whining, you are concerned about your health. More younger people are getting HN HPV cancer, which mainly effects the oropharynx 90 percent of the time, but can go to the oral tongue or occur there, sometimes. Most times symptoms are likely from other causes, but it's best to get checked out. If they don't do a biopsy, did they at least do a series of blood tests to see if anything out of range, maybe a blood culture, oral culture, and other tests not on the usual CBC, CMP, like for std's, which can occur and cause oral symptoms. There must be some type of tooth guard, wax mold, to put on your teeth where the cut is, to see if this helps. You may not know you are biting your tongue in your sleep. Stress can also cause ulcers. Otherwise, you just have to be persistent to get answers, and keep going back. Good luck.