Light brown discharge 10 days before period?

Magdalene

Hello to all of you beautiful people ❤ This morning when I went to the toilet, I noticed some light brown discharge on the toiletpaper. It smelled a little bit like blood 😑 And now again. And my lower back hurts like it normally woud, when im getting my period. But... I am not expecting my period for another 10 days. Should I go to the doctor or is it harmless? I have a 30 day cycle.