Gender Roles are Negotiable. Sometimes the woman wants to pay for a night out -- and sometimes it's the guy who stays home to raise the children. This means your old fashioned dating rules will have to be a little more flexible nowadays... and that is a wonderful thing.
Roughly: HCG drops at roughly the same rate it rises when a pregnancy fails, so an hCG of 400 can easily take 30 days to drop down to 10 or less. If you are concerned you should ask your doctor (or a doctor) to check a quant hCG again. ...
When the Dr. says that your HCG level needs to be at 0 they really mean 5. After a miscarriage, two things need to happen: 1.HCG level needs to be under 5 and 2. you need to have one full normal cycle of a period. This doesn't mean you can't get preg before then but it ensures your body and next baby will both be healthy and it decreases the risk of another miscarriage.