Beta HCG 30

This is my third pregnancy this year. The last two were MMC and early MC at 5 weeks. Last month was my second miscarriage this year and my Hcg went from 37 to 57 to 14 within 5 days. Now I’m so nervous because I don’t know how many dpo I am or when my period is supposed to start due to not tracking anything after last months miscarriage, but my beta blood test today after 5 positive urine tests was only 30. I know it’s all in how the numbers double, but I’m just finding it hard to be optimistic right now. Anyone have a beta this low and go on to have a healthy pregnancy? 😞