Implantation bleeding or early period?

Ashley

On Tuesday I was 10 DPO and started having lite cramps and lower back pain. Yesterday (11DPO) I still had lite cramps and lower back pain but in the afternoon I went pee and when I wiped there was lite pink blood, it happened 2 others times and then it was brown. Today I’m 12DPO and I woke up and it’s still very lite and pink but only when I pee. I checked with my fingers to see what my CM looked like and it was cloudy with a tinge of brown. The cramps come and go but the worst pains in my back on 1 side?Could this be my period coming or implantation bleeding? Could I bleed for more then 1 day?