HCG Level 9,000 at 5 weeks and 5 days

So I went to ER 3 days ago because I was having sharp pains in my pelvic area and hips, turns out I had a small UTI infection but because of my fibromyalgia the pain felt worse then what it was but anyways they did and ultrasound it all came back fine and my HCG level was 9,000 which to me is amazing but Idk what that means I feel like that's really high for only 5 weeks and 5 days, this also my 6 pregnancy and I've never carried one and in my past pregnancy I've never had an HCG level above 1200 so i need your opinion my husband thinks I'm having twins!