Implantation bleeding or AF?

[nursing12]

Yesterday at 7DPO I got my period. It's a lot slower and lighter than usual but too heavy to be implantation bleeding. It's bright red and there are a few clots here and there. At 6 DPO I was presenting PMS symptoms. Could it be a wonky period because ive been stressed and eating less or am I just experiencing heavy implantation bleeding with some clots and tender boobs before the period? I'm so confused.