thank you for your query.
If you have been indulging in unprotected sexual intercourse, you have to think of a possibility of pregnancy
If you have missed your period, I would advise you to wait for a week more, and then take a urine pregnancy test.
The urine infection should have been adequately treated, but it does not lead to late or missed periods.
Meanwhile, drink plenty of fluids and maintain local hygiene to avoid repeated infections.