Confused, a bit.

So, I have a normal 28 day cycle. Therefore, I am supposed to start my period in 2 days. This morning, I went to pee and when I wiped there was this very light pink. Every time I am about to start my period I feel bad cramping and backaches. I haven’t felt any of this! Well, after I wiped (about 30 minutes later) I felt a sharp pain in my left ovary. Anyone have implantation 2 days before period or is this my period? This is about 40 minutes after the first wipe. Normally my period starts off heavier than this.