Hi. 5 weeks ago i had unprotected sex . 2 weeks ago i had COVID for 10 days. Now i have enlarged lymphnodes in necknand under the jaw. I have red throat for 3 weeks. 4th generation test at 28 days came back negative. Blood test are normal. My ASO titre os 500 . I m now on penicilin but its like 7 day and everything is the same. What else can i do to know why anibiotics are not helping me.