Does anyone know how long HCG will stay in your body after a miscarriage? I had a miscarriage on May 13th but my doctors office never took a beta-HCG test so I have no established levels to monitor. I bought HCG cheapies and took one a couple days ago and still get a very clear positive. I've been reading that you can't get pregnant again until it levels off to zero and you get a negative pregnancy test.... Just wondering, on average, how long that might be?!