Welcome to OCF. Im sorry you are experiencing problems. Perhaps your weakness is a result of the decreased appetite and your weight loss? If you are not eating, then you will lose weight and become malnourished. When that happens you will not feel very good.

The tests normally used to detect oral cancer are a biopsy, CT scan or PET scan. A biopsy is the best way to tell for sure if your tumor is cancerous. If it came back negative is there another tumor present that needs a biopsy? If you are unhappy with your doctors a second opinion is always a good idea.

I hope you find answers to what is going on with the bleeding in your mouth and all the other symptoms you are having. Find a good Ear, Nose and Throat specialist who will give you a thorough exam and do the necessary tests. Then you will find peace that you have exhausted all the options available and have an answer as to whats happening.

I hope you do not have cancer and it turns out to be a simple explanation.