It is uncommon for a urinary tract infection (UTI) to delay your period. These are separate processes, and cystitis, which is a type of UTI, rarely affects the menstrual cycle.
Cystitis is a urinary infection that occurs in the bladder and is usually caused by bacteria such as Escherichia coli. Common symptoms include pain or burning while urinating, discomfort in the lower abdomen, and a sudden or frequent urge to urinate.
Menstruation, on the other hand, is a natural process triggered by hormonal changes during the menstrual cycle. These changes cause the shedding of the endometrium, the inner lining of the uterus.
If your period is more than 7 days late, it is important to see a gynecologist or primary care doctor to determine the cause. In some cases, a pregnancy test may be recommended to check whether pregnancy is the reason for the delay.