Recurring sore throat. Done to confirm?

Hi doctor, on 28th Feb, i consumed alcohol, and also had unprotected oral and vaginal sex. 2-3 days after , i developed intense sore throat And i was having lot of pain while swallowing, with white patches ( first picture attached) but NO common cold symptoms. I went to the doctor, gave me antibiotic, allergy and i got healed. Within a week the same  throat pain and symptoms came back with white patches. I again went to the doctor, this time he gave me Moxykind cv 625 plus allergy. I again got better, pain went away , my patches reduced ( see 2nd picture).  But after 4 days of taking moxykind, i started having a scratchy, slightly burning feeling in my lower throat near the collar bone area. And today, my throat is hurting again but there are only very less white patches ( see 2nd picture) I am worried could it be an Oral STI?? Like gonnorhea or chylamadiya If yes. What tests should I get done to confirm?