Should I go to the ER?

Hi I'm 16f I just got my first period- sitting on the toilet rn. I saturated a pad in 20 minutes and I feel dizzy and shaky and my vision goes weird if I stand up what should I do?

Height; 157cm Weight: 90lbs

Edit: thank you. My parents are away for the week so I got my older brother to drive me to the ER. We are waiting now, but I've had blood tests done and am hooked up to an IV in a room.