I got my BFP on Monday. Had bloods on Wednesday and found out today they were 45. Doctor sent me for an ultrasound to rule out ectopic and they couldn't see anything, in tubes or uterus. She said I might be too early. Going my period dates (last one 5th august) I am 5 weeks 2 days, but I ovulate late. Last cycle I got my last positive opk on 25th so could have ovulated 26/27th. So I could have been 15dpo when blood was taken. Is there still a chance this could be viable? Anyone have very low hcg how did it end up?