Implantation Bleeding?

So my period isn't due for another 8 days. The past week I've been emotional and tired alot. Which I contributed to just not getting enough sleep. But yesterday and today I've been cramping and I went to the restroom earlier and noticed a very very very light brownish discharge on my underwear and when I wiped there was a tiny bit of pink, almost not enough to notice. Could this be implantation bleeding? I've never had this happen before, with my first I just missed my period.