Spotting? Implantation bleeding? Over thinking?

[Jmm21]

So Im due Flo in the next 4/5 days... I have woke up this morning to what I can only describe as a bit of brown discharge when I wipe (sorry TMI) literally only a bit first thing and then once more when I visited the toilet... would it be wrong of me to get my hopes up about being pregnant? Could this be implantation? Or just Flo on the way? Could this be my first sign... anyone else had this if so what was your outcome? All advice welcome! Thanks in advance!