Hi thanks for your question.
From the symptoms you have described,it looks like you have got urinary tract infection
after sexual intercourse(urine examination confirms that),which happens sometime after sex and there is nothing to worry in this regards.
Along with UTI you also have got infection of vaginal wall,which could be due a boil or due to minor trauma which you might got during sexual act.
Your already on antibiotics,
Reconsultation with your physician is advisible.
From the symptoms,it doesn't look like your having herpese.
Hope this answers your question.