I had my period on December 12th . I started having dark brown blood on January 2nd and then turn to light brown yesterday. Last night I went to bed there was nothing and today so far nothing either . I would only be on day 24 based on the app and when from last period came. So could it be the start of my period or implantation bleeding. When I had my last pregnancy which ended in a miscarriage kinda of did the same thing