Please help .. Low hcg level possible MC

Kennedy • Married to my soulmate since 7.4.2020!💍💞 We have a 4 year old son, who took a year and a half to conceive! We are expecting baby girl March 11th 2021 after 2 1/2 years of ttc with fertility treatments 💖
So I got my bfp 2 days ago and I went to the ER due to some pain I was having. I was concerned that something was wrong. They took my urine and blood confirmed my pregnancy but said my hcg levels were only 57... They said its either very early on or Im miscarrying. They said come back in 2 days in the morning time and if your hcg levels arent higher and theyve dropped then your probably miscarrying... Im very heartbroken and sad. Did anyone with low hcg levels have a.successful pregnancy? I need optimism please help.