implantation bleeding?

I will tell u the information that I read and that is ib will start about 6-12 days offer sex and it usually occur before ur af it is also a very vibrant color very light and it will come and go for hours or days u will have very light/ faint cramps that come and go..

With this being said I actually got my period really early 4 days early actually and it was very bright red which was weird to me and then it would stop and come back and the last couple hours it became very light brownish I also didn't get cramps like I usually do (usually I'm in bed crying becuz my cramps are ao bad and I'm very moody) I'd get a sharp pain here and there and didn't have pms at all ( which is not normal)  .. any idea if this could be implantation bleeding or should I just wait till my next af n see if I get it?