Spotting

Hi everyone,8th of may I found I was pregnant  i had spotting 18days now I went to the clinic for my ultrasound appointment the result is no sac found,obygyne said maybe I miscarriage 2weeks before or I'm pregnant but in the outside of my ovary but I have no pain at all,but all my test is positive hpt,hcg 111 she said very low for pregnant women,do you think is to early to undergo in ultrasound that's why no sac found,please help me anyone  experience this. I'm still hoping:-(pray for me :(