Implantation or period ?

Hi ladies, I got what I think is my period a day earlier then usual. I normally start exactly the day I’m supposed to. This period is kind of weird. It started yesterday with CM and some brown blood, then nothing for hours then pink spotting. Started having cramps and lower back pain later on but still no heavy bleeding. It would only be light pink when I would wipe. Then I got some darker blood, today i still have the darker blood but no cramps or anything. Doesn’t even fill my panty liner and normally I’m very heavy and I have very bad cramps the first two days of my period. This hasn’t happened to me before I’m not sure if its implantation bleeding or a period. The fact that I have no cramps is more weird for me, I have never not had cramps during a period.

I have also been having odd symptoms for over a week now, severe nausea, sore breasts (nipples felt like someone is sandpapering them) ,lower back pain etc.

Anyone else go through this? Your insight would be greatly appreciated. Thank you !