Help!! I need to fake my period

UPDATE: my mom found out the same day I posted this ! 
She knew it was food coloring and she was mad .-. 
Still mad about the baby too but hopefully she comes around
I found out I'm pregnant and my mom can't know yet 
She's attentive of my pad situation and that there's used pads in the trash bin.. 
How can I fake a period ?? Is it possible ?? 
Anything helps...
She'll find out eventually but for right now she just can't know 
EDIT: That's how she noticed I hadn't started my period
There wasn't any blood