Nanci,
Welcome to this site. I'm glad you found it, even if it's a bit late in terms of your treatment. It sounds as though you had surgery, but not chemo or radiation -- correct? What did the pathology reports show from your hemiglossectomy as to the stage and nature of the tumor? Is your mouth dry because you had some salivary glands removed during surgery?
Recovery from this kind of treatment can be slow and frustrating at times, although it seems to vary from person to person. You should continue to watch for anything suspicious that shows up, such as the new white spot. Generally, if something like that doesn't go away on its own within a couple of weeks, it should be checked out promptly by someone on your H&N team. Often it turns out to be benign, but it pays to investigate it sooner rather than later.
Cathy