went to er on monday for cramping and slight bleeding. hcg was 8000. did vaginal us saw yolk sac but no baby. i was 5w5d. they said that’s pretty normal for that gestation. went back today for repeat hcg and it was well over 17500. so in 69ish hours it more than doubled. i know they say it should double every 48 hours so should it have jumped up more than that or are those numbers ok? dr didn’t reallly say anything.