pill question! need input!

Megan
So I take my third sugar pill tonight of my first ever pack of bc pills 
First pill I had some blood in my discharge, second pill I woke up, had brown discharge which turned into a more period like bleed (very light still) I've had cramping too 
My question is, is it normal for it to be this light and to still have some cramping on the pill? Do you usually get lighter periods on the pill?