Blood work done - need help!!!

Blood test results came back from yesterday saying I’m pregnant! 🎉🎉 but only 20 HCGs. Which the doctor said could be 2 things

I’m just very early

Miscarriage

Has anyone else had this? I’m a week late for my period and I feel it shouldn’t be too early/HCGs should be higher.

Going again tomorrow to see if HCG rises.

Wondering if anyone had this happen and had a miscarriage :(