But unfortunately, if the bleeding is caused
by a miscarriage
, bed rest will not stop a miscarriage
. There are some unusual possibilities that would explain hCG appearing, then lowering, then rising again, I noticed you read Carmella's post and so don't need to repeat them here. Really all you can do is wait, as they told you at the hospital, and have your hCG tested again after a week to see if it is going up or down. And please see your ob-gyn. He or she will be the best advisor.