Blighten ovum measuring 7w5d

Good bye team January..... I went in for ultrasound this morning because of abdominal pain and lower back ache with brown discharge... Doctor said that the pregnancy is abnormal, there is no embryo in the sac.... He was able to see a placenta but no baby there.

According to my lmp I am 8w4d but today scan says 7w5d...

As I was about leaving the hospital bleeding started and I passed out a big cloth of blood and since then will now I have been having severe abdominal pain and lower back ache....

Has anyone here experience blighten ovum