Hi thanks for your question.
From the symptoms it looks like that your having urinary tract infection
(UTI) .Your prostate
size is mildy enlarged but enlargement of prostate is not necessary for to get it infected.It can get infected even when it is of normal size.
Ciprofloxcinin has improved your symptoms this proved that your having UTI.Consult some physician get your urine examine done to conirm your UTI and contnue ciprofloxcin for a week.
Hope this answers your question.