Endometriosis

I've been having on going ultrasounds to see if I have endometriosis or polycystic ovarys. I've been bleeding now all day for 5 and a bit weeks. The bleeding won't stop and I'm over it! I can go through 3 tampons a day or one pad. But its like the blood doesn't come out of me like onto a pad it just sort of sits in there so if I am to put a tampon up there or my finger it will come out on my finger or tampon or after I wipe after peeing. Although when I wake in the morning it all leaks out. I'm so run down. I was admitted to hospital early Monday morning from vomiting all night and having so much cramping. At times it's like someone is ripping at my utrus and there is an ache in my lower back on both sides. But they can't find anything on the ultrasound but then I'm told this isn't the way they test for it but my gp thinks other wise.
What should my next step be to see if I have it? I just want to feel normal again. If I do have it what do I do then?