Greetings Emily and welcome to healthboards!
I am not sayig this is the problem and of course the professionals are the ones a person can consult. I found out that sometimes a strep
infection can cause symptoms like that.
Unfortunately sometimes even antibiotics or heat does not destroy germs.
Strengthening the body is usually useful with a good healthy lifestyle. I would eat more grapefruit, kiwi, lemon, lime, and drink raw garlic water 3 times a day for 2 weeks if possible. The garlic can be put in water and blended and then strained out. If it seems difficult this way perhaps it can be minced and put in homemade salad dressing or in mix in the food in other ways. I would not use sugar or sweetening of any type since germs love sugar. Of course everyone makes their own health care decisions in life and does what they think is needed. My sympathies for this. Peace, sjb