Af or implantation?

I’m 5 days late for AF. I didn’t test this cycle so I’m not sure If or when I ovulated. I am never late for AF bar my 1st pregnancy. All tests are Negative but Symptoms have been: Sore Boobs, Nausea, Heartburn every single day, endless hunger & cramping started this morning and Iv just had this *Picture below* can anyone tell me if this could be AF or maybe Implantation?