Hello,
Thanks for posting your query at DoctorSpring.com
B HCG levels are extremely variable, they are NEVER used for dating a pregnancy, because they vary from person to person.
I will provide a link for you, and you can see that what is considered ' normal ' , varies tremendously, and there is a huge range that comes under ' normal '.
Here is the link -
http://americanpregnancy.org/while-pregnant/hcg-levels/
Yes, your values are slightly on the higher side, but nothing ominous.
I would not jump to any conclusions, a strong healthy viable single intra uterine pregnancy might have robust values too.
Wait for the 3rd test, and even then, nothing is conclusive until you have an ultrasound scan at around 6 weeks.
Only that will be definitive and conclusive, the rest is speculation.
Multiple pregnancy is what is remotely possible, not Downs.
Downs is SUGGESTED by a conjunction of high B hcg ( unconjugated, which is not even measured by this specific test that you had ) and low values of 2 other hormones, and that too around 11 - 14 weeks.
Please, you are so rational, do NOT resort to Dr. Google, it will only add to your anxiety and confusion.
Relax, wait until your scan.
ANd yes, cramping and nausea are subjective.
No more nausea does not mean anything either ways, but if the cramping is bad, talk to your doctor about progesterone supplementation, in view of the earlier miscarriage.
All the best
Please feel free to discuss further.
Hope this helped you to some extent ?