So, is it still sore? Try some ibuprofen or tylenol, this can often help. Is your nose at all stuffy? Could you be sleeping with your mouth open? That's another reason for a dry throat. Any chance you have acid reflux? Here's a list of potential reasons you may have dry throat. See if any match. https://www.healthline.com/health/dry-throat#sleeping-with-your-mouth-open