If you were previously menstruating every 28-30 days, your pregnancy
should now be around 8 weeks. Usually, beta-hCG
levels at this stage are around 7,000-220,000 mIU/ml. Ultrasound diagnosis is better made only after the levels reach 2000 mIU/ml. A gestational sac
is usually viewed in a trans-vaginal ultrasound
when the levels reach 1000-2000 mIU/ml. If not, it could be either an ectopic pregnancy or a very early intrauterine pregnancy.In such a case, the tests need to be repeated again to establish the diagnosis. Since your beta-hCG levels have gone up fast, which is not the case with an ectopic pregnancy, your chances of having an intrauterine pregnancy are high. Please consult your gynecologist after the sonogram for further advice. Good luck.