Impossible to say--in my opinion, I doubt it. Women bleed for more reasons that just a period and implantation bleeding. Sounds too heavy for implantation bleeding. IF you have it, it would be light--just a spot when you use the bathroom maybe once or twice. A fertilized egg is NOT going to cause any form of actual bleeding.
The thing is ive had implant bleeding before and it was just like my normal period except it was four days instead of my normal 7.
How do you know it was implantation bleeding? It doesn't make the description at all and sounds more like decidual bleeding.