Thanks for your query.Based on the fact that you have posted it appears that you have acquired Acute Urinary Tract Infection
after unprotected sex.Please get your Routine Urine Test and Microscopic examination (Gram Staining ) of the pus from Urethra done to rule out Gonorrhoea
.done.Take some antibiotics like Augmentin
along with Urinary antiseptic like Nitrofurantoin
twice daily with some Urine Alkaliser.Ensure to drink plenty of water.
Get your blood tests done to rule out STD .