short period? implantation

Hailee
I need some advice... so my period is usually never early... my period is due Wednesday. On  Monday  I started cramping and spotting pink... I have had a couple spurts of red on my tampon but not enough to soak it. Today... (Tuesday)... my tampons been in over 4 hours because I work in mental health and haven't had a chance... but I have just brown spotting type blood on my tampon.. do you think this was just a super short period? Or could it be implantation?!