Has this happened to anyone?

So after my cycle ended on July 28th, I ended up having light bleeding on the 31st I posted this and many people said this was a continuation of my period? However this has never happened! I stopped bleeding maybe 2 days or a day later! Now that I am 9 days away from this current cycle I have had some intense cramps last night was the worst I tossed and turned and it woke me up out of my sleep. Can anyone give me some advice? Has this happened to anyone and was potentially pregnant? I’m just curious!!!?? Could this had been implantation bleeding???