Is this normal for implantation bleeding?

So usually my periods last 3 days, starts light and get heavier. But for some reason 1) my period started 3 days earlier 2) I basically spotted for 1 day and then it stopped. Then it stopped for a whole day, then it picked up like a light period (mind you my flows are usually heavy heavy) and then it went back to spotting and now it's my 6th day and I'm still spotting is this normal???..?