Obviously you know that no one on the web is going to be able to diagnose you long distance from your description of things. Having said that, I would suggest that you visit someone who is versed in oral pathologies. You can start with a dentist or perhaps an oral surgeon. If you live in a large community, or one that has a dental teaching institution, you will find an oral pathologist on staff. They would be my first choice for an opinion. The routes of metastasis are generally through the blood stream and the lymph system, though not exclusively. It would therefore be an unlikely event for something on your fore head to move to your mouth given little in the way of means. After two weeks you should have the radiologist's report on your scan. It may require you to push your doctor some to get the results, as they seem in no hurry to get the information to you. Once that comes in you may have some peace of mind. But in relationship to the bumps in your mouth, the prudent thing would be to have someone take a look. Given your age and lack of tobacco use, you are an unlikely candidate for oral cancer, though it is not impossible.