Progesterone level normal at 5 weeks?

Sarah • 32 years old; married
Had my 5 wk. blood draw and my progesterone was 17.48. At 3.5 wks my progesterone was 16.7 and I was put on 200mg suppositories 1x/day. Is it normal for progesterone to only rise a tad especially on suppositories? I'm concerned and dr. Isn't in until tomorrow. My HCG numbers were good. Thanks for your help! 

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