Aiyooo, HCG level tu memang beza-beza on everyone lah, tapi yang penting is how it doubles dalam few days, one of my mum friends pun dulu dapat number macam tu awal-awal, then lepas 48 jam it went up nicely and everything turned out fine! Tapi honestly, since you're worried, better check with your doctor or OB jadi dia boleh follow up your numbers and make sure everything progressing ok, they know your full situation best, and at 5 weeks this is exactly what they want to monitor anyway. Don't stress yourself out lah, just get the doctor to do another test after 2-3 days to see the trend, that's the real picture