Has anyone's dry mouth pain gotten better at all with management techniques? My mouth hurts!

I have a lip biopsy next week to confirm diagnosis.

My tongue hurts so bad! My gums get sore and hurt too but that's not painful and doesn't bother me at all. My tongue is what bothers me the most I just want to scream. Has anyone had super bad pain like this and then managed to get out of it? I know the dryness won't go away but what can I do to get out of the pain cycle at least? Everyone I've seen post on here saying their mouth hurts says it just continues to hurt. I haven't seen anyone say anything helped. I feel super discouraged.