Im so confused please help

So I come on my period on the 29th of december and come of on the 5th of January the first two days was just brown blood here and their, the third, fourth and fifth day their was normal blood and then again on the sixth and seventh day it was brown again. Today I had cm that was a very light pink but it was enough for me to notice I only had it when I wiped once. I’ve had cramping but it can’t be implantation or anything like that because before my last period I was having regular unprotected sex with the same people but been using protection since the 22nd of December...