Help?!?

Nykki

So we had positive Opk’s and BD on those days ... I was one day late for my period negative test ... started bleeding second day but light pink , later that day it got darker and red but day 2 of bleeding was off and on and dark red and brown , day 3 was also off and on and very dark brown , day 4 was non existent and today is back to light pink spotting ... which is what would normally be my last (5th) day of my period ... negative test yesterday ... could this be Implantation bleeding , I have had 4 kids ... and have had every different experience , early tests late tests , implantation bleeding ; no bleeding ... last pregnancy I didn’t get a positive test until a few days after my whole period was missed , but had no bleeding so I’m just like hmmm , picture was how first day of bleeding started