I am really not having a fun time here

A few days ago I woke up and felt like I was catching a cold, and by the end of the day I felt a fever coming on so I tried sleeping it off. I woke up with a pounding headache , fever and a sore throat.

By day two, my fever had left, I have no appetite (this happens to me all the time when I catch colds). But the back of my throat and under my tongue has small scattered blisters on it and is beat red. I'm also overwhelmed with fatigue.

I have had similar blisters in the past when I have eaten acidic foods but they were never accompanied with high fever of cold-like symptoms. Only my thoat is bothering me now.

I think it might have been made worse because I may have been taking too many Cepacols (maybe an allergy here?)

Any ideas on what this might be? (I'm a teenager by the way)

Thankyou for your time!!