Implantation bleeding 🩸 vs Period

LA

My Period is 12 days late so I wasn’t sure if I was pregnant, becoming pregnant or what have you. I took a few dollar tree test which were negative. My period comes on every 28 days except last month (39 days) and this Month 40 days. Today I start bleeding but I’m not sure if it’s my period or implantation. It’s light is color pink to brown in color, loose, watery not cramping and not clotting or anything as of yet. What do you guys think?