Progesterone question

When I went in for my initial blood work to confirm my pregnancy they did hcg and progesterone my hcg doubled from 341 to 707 in 48 hours at 16DPO. My progesterone was only at a 9.3 so I was put on progesterone suppositories to help. I’ve read mixed statements on how they help in some cases but in others just prolong diagnosis of a miscarriage because low progesterone can be an indicator of abnormal pregnancy... has anyone had a low level and carried to term? I’m about 7 weeks now results were done at 4.2 weeks and my first sono is tomorrow

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