How do I know if I started my period?

How do I know if I started my period
so

You'll know!! When you go to the bathroom you will either see blood in the toilet and when you wipe. You won't miss it.

You will know. It will kinda feel like you are leaking and you will go to the bathroom and...walla there is your period.

Well...im sure you know that when you start your period...you see blood ...basic knowledge.
You may get cramps...^^ you may feel like your leaking and will find blood when you go to the toilet.

Sorry I find this a sort of pointless question.