Been on my period too long

I’ve been ok my period now for 8 days, it’s been really bad. I haven’t been able to sleep for more then an hour and a half cause of how heavy the flow is cause if I do I wake up covered in blood. I’m constantly changing my pads and tampons. This has happened before 2 years ago and I had to get a blood transfusion cause I lost so much blood I’m worried it’s gonna happen again what should I do!?