Question about really heavy period?

I am bleeding WAY to much. I had an appendectomy the other night and they sent me home yesterday, but now I am bleeding so heavy (from my period) and I am so dizzy I can barely make it to the bathroom and back without almost ping out. I can't really take tylenol (i have really bad cramps too) because it makes me sick. the hospital didn't give me painkillers after the surgery. I really don't know what to do. I feel like I am going to p out, and I am bleeding so heavy. I have NO color in my face at all. Should I go to the hospital or should I just wait it out and sleep?