Progesterone and hcg at 5 weeks 4 days !!!

Since the moment I got a positive pregnancy test my doctor ordered bloodwork for hcg and progesterone ,given my history . My progesterone last week was 20.5 and hcg was 3,700 and now my progesterone as of yesterday’s blood draw is 12 and my hcg has increased to 17,000 . She told me I don’t have anything to worry about bc 12 is still normal and progesterone fluctuates during the day . She prescribed me progesterone just to ease my worries plus it doesn’t hurt hurt . What’s everyone’s experience with this ? Should I be worried ?