So my period was late by 5 days and i took two test that came out negative then the day after i started spotting a lot and it was mainly just dark brown i just assumed it was my period but throughout my period it was only spotting and brown or very very light, that lasted about 4 days and now im barely spotting brown and usually my period is 7 days long. im only 17 and im going to take two more tests tonight but should i go to the doctors ?