4w5d US and blood test

Jessica
They checked me for an ectopic pregnancy, on the ultrasound they were able to see the sac, which measured about 5.2 weeks and blood test showed HCG around 1400 (she said that was more in line witch late four weeks). Trying not to be concerned about the lack of an embryo- has anyone had such an early US and did it turn out ok?
Also having trouble putting me HCG in context, and don't know yet if it is rising... is that a normal number?