Hello, i have noticed some random discoloration in my mouth, a moveable bump under my tongue, my tongue is white, and i also have a loss in taste. Around the same time its been hard for me to use the bathroom. So i think i have constipation.
Maybe underactive thyroid only because i know someone who had it and also had a similiar problem to what your having so not sure if they could be related. Are you really tired, getting sick easy, or having joint/muscle pains?
You might want to check about "thrush" or "Candidis" which is a yeast infection that you might have in your mouth and throat. This is not uncommon in diabetics.