Hcg level confusion?

had my blood drawn yesterday to check levels and my HCG was 215 at 3 weeks 5 days. I go back tomorrow to get them retested and I’m PRAYING that they double. This is pregnancy #4 but sadly no living babies, does 215 sound promising? I don’t know how I’m supposed to make it through this weekend without finding out if the numbers are going up 😭