There is a bump on the hard palate of my mouth (front roof of mouth). It is near the front teath. It is a little redder than the rest and feels smoother than the surrounding area and its hard. Its about the length of a dime and almost as wide. It doesnt look to bad but the fact that its there distresses me. I wear a retainer and do not have any stds (not that I know of), so what could this be?