Wtf is happening

So on July 8, 2016 I was put on nexplanon and for the first year I was bleeding like none stop but after that I stopped having period completely. I got the implanon taken out in June. I just started my period on the 8th of August and there is barely any blood. Like it’s light pink and I’ve only been bleeding later in the day. I’m not having a constant flow. My cramps are horrendous and each day when I start bleeding again the color of the blood gets a tiny bit darker. Is that normal?