Hello Thanks for your health concern. At 4 - 6 weeks pregnancy, the HCG can go as high as 50 - 60000. However, that would definitely be accompanied by a fetal pole at 6 weeks in a viable pregnancy. Was the scan done vaginally ? Abdominal scans have poor resolution SO ensure that scan is done vaginally. Also, it could indicate a blighted ovum or a vesicular mole, where the chorionic tissue proliferates to form a kind of benign tumour . In twin pregnancies too, such high levels are seen. What you can do is wait for a week , and then have a repeat scan. There is no point repeating in just two days. Do not stress out meanwhile, continue taking folic acid. All the best.