I'm trying to figure this out

I just found I'm pregnant, cause I been bleeding for 15 days now and I found out I was pregnant 2 days ago ,I went to the ER and they said my hcg levels was very high ,but the only thing is they couldn't find no baby or sac or nothing, this is my first time pregnant and I'm 29yrs old, so I went in today and saw my pcp and she basically told me I might be having a spontaneous miscarriage, but the hospital told me two days ago it was a threaten miscarriage, so I just checked my cervical position and it's closed right now and a lil high , your thoughts plz