Low Hcg

I tested Positive on a couple of pregnancy tests, and my doctor took my hCG results today. I am 15-16DPO, and my hcg is only 47. I’m getting it checked again in 48 hours. Can you guys please send me some advice on this number, and some success stories on low hcg becoming viable pregnancies? 🥺🥺🥺🙏🏻🙏🏻🙏🏻