According to your description, the above symptoms are considered to be pharyngitis, and generally there will be sore throat and dry mouth.

Suggestions:

You can eat some amoxicillin and Liyan Jiedu granules, including throat pills or watermelon frost, and drink plenty of water, eat more fresh fruits and vegetables, such as kiwi fruit, pears and apples, and don't eat spicy food, especially chili fish, shrimp and mutton.