I am currently on birth control and have been for about three years along with brig sexually active for about two. Recently within my past four cycles I ve noticed the colour of my blood is often brown with some noticeable red spots. It is thin, stringy and sometimes clumpy. I m concerned with this issue along with the fact that I was suppose to get my period two days ago, and the situation remains the same( brown and stringy) however I ve had barely any bleeding , just spotting. What could this be from and is there any immediate concerns