REALLY HEAVY FLOW PLEASE HELP

I’m changing almost every half an hour my pad . And I am wearing night pad

I know it’s a lot and I will go to the doctor but now until tommorow (it’s night now ) what should I do ? Cause if I need to change every half hour I can’t sleep

And I am also sick with fever since suturday so I am getting g really exhausted with this .

ANY ADVISE ?