Hi! i had my period on dec 12. i had spotting on day 15 and 28-29 of my cycle. i have long 43 day cycles. now it's 53days since last period. we used protection and the test is negativ as of today. what could cause missed/delayed period? please help!

Irregular periods: Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. Infections ; hormonal changes can cause spotting. If there is a concern for pregnancy then do a home pregnancy test . There are many options available to help regulate the menstrual cycle. Schedule a visit.