Light bleeding 4 days before my period ?

Question

This never happens to me ! I wonder why my period is starting early 🤔🤔🤔🤔

Answer

Its normal to spot before starting your period. It used to never happen to me, then it happened for over a year, now it doesnt anymore. Its likely due to progesterone levels dropping slowly instead of sharply. Periods change.
You also could have ovulated earlier this cycle which would bring on your period sooner. 
I know others said it could be implanration spotting, but thats more of a myth than anything else.

Answer

It could be Implantation bleeding.

Answer

Could be implantation or just pre-period spotting. This can happen from time to time.