Viable pregnancy.confused

Patient: Is my pregnancy viable?

Symptoms: By lmp I would be 9 weeks. Positive hpt on 1/07/14. Blood work at ob office on Jan 27th was 6400.I had spotting the weekend after first draw and period like cramps also.blood draw jan30th 8400.u/s Feb 4th only a sac that measured 6 weeks no fetal pole. Blood draw same day 14,975. Nurse practitioner said blighted ovum.blood draw 2/10 15,750. Doctor thinks early gestation.but if that’s so would it be possible to get a very light on Jan 7th. So was the urine test at ob appt on jan14.they actually said i wasn’t then five minutes later and said it finally showed but was very light.