I am a little over 6 weeks postpartum. My baby was born April 11th Breast-fed For only two weeks. Stopped bleeding at about 3 weeks. Yesterday I had some light spotting that started out pink and then turned brown with some discharge like stringy type. and now there is nothing. I have had sex but It wasn't protected I also took a pregnancy test 2 days ago and it was negative. Is this normal to have a little bit of spotting when I had nothing for over 3 weeks and still have not gotten my period?