I have small red spots/sores under my tongue , on the roof of my mouth toward the back, and in my throat. mouth/ throat is sore and sensitive.

Seek an oral exam: The small red spots could be of many different origins. An avenue to pursue is to see of they are of a bacterial or fungal nature. Please seek your dentist for a differential diagnosis. A thorough exam should yield relief and rule out any underlying pathology. This way the appropriate medication oral or topical canbe given to relive your symptoms and concerns.