Your beta-hCG of 1781 confirms a pregnancy, since anything above 5 counts as positive. Going by the lab's own ranges, this level points to a very early pregnancy, around 3 to 4 weeks along. One reading alone cannot show whether the pregnancy is progressing normally.
Next Steps
A repeat beta-hCG after 48 hours is the usual next step, since the level should roughly double at this stage. Once it is high enough, your gynaecologist will also time an ultrasound to confirm the pregnancy's location.
Health Tips
Please see your gynaecologist sooner if you notice cramping, pain, or bleeding. These need checking in person, whatever the hCG value shows.