Ang HCG levels talaga ay super variable from person to person, kaya hindi mo dapat mag-worry too much if hindi ka perfectly aligned sa "standard" ranges, a few of us moms here had similar situations where our counts didn't match the expected week! Best talaga na i-follow up with your OB because they'll do a repeat blood test in a few days to see if the levels are doubling properly, which is what really matters more than just one number. Congrats on the pregnancy, mommy!