Brownish discharge

Nita • Mother to a beautiful Gabby. Due with number 2 Jan 8th 2017 😄😄👶❤👪🎇🎇🎆🎆
What does it mean when you have brown discharge two weeks before your period?. my last AF was May 23-28th my next one is due the 20th I've never had this before could it be implantation bleeding?