You took your pregnancy test at the proper time (after you missed an expected period) and according to the result (negative) you are probably not pregnant. You can take another test, in any case, just to confirm.

A urinary tract infection can’t cause you to miss a menstrual period. A missed period can be due to pregnancy or a functional disorder of the axis hypothalamus-pituitary gland-ovaries. The most common disorder that can cause period-missing is persistence of some type of hormonally active ovarian cyst. When the cyst becomes inactive you will get your period but it won't look like the regular periods.

You can consult your gynecologist for further advice and to identify what's going on.