10 weeks late!!

Hi all, I am 10 weeks late. I have had no luck with urine tests as they have either come back negative or inconclusive from the dr. I had one faint positive at around 6 weeks, the dr has no idea what is going on either as I have had pregnancy symptoms but my hcg levels are really low. I am due for on ultrasound on 13/10. Hope I get an answer soon!!