Please help ,Throat red with pale pimples in back of throat and tonsils

Hi.i m 23 male
, I have developed pimples in back of throat that are pale in colour and same on tonsils. One of the pimple on tonsils has a white mouth. I first noticed them when I felt swallowing pain two months back. My throat was red back then. I had oral sex with an unknown girl a week back. I felt fatigue and nausea. So I took a dose of antibiotics and antifungal from doctor. My symptoms resolved in a week. But I feel the pimples recurring again and again and resolving themselves. But this time I have pimples for 10 days now , I had antibiotics for a week but the pimples decreased in size but not cleared completely.they are painless but with little irritation when swallowing. Sometimes the upper lining of mouth feels rough but plain on other days.i don't have fever or fatigue. Sleep, hunger ,thirst is normal.
[Edited by Oturpurerc on 2017-06-27 06:56:24]