Low progesterone level, 5 weeks pregnant

Ryan • Happily married since 11-8-14
After taking 7 hpts, all positive, I went for bloodwork on Friday 6/19. The Dr called me today and said my Hcg level is good (9000) but my progesterone level is low (5.9) and has me coming in tomorrow for an ultrasound to see how everything is coming along and make sure it's not a tubal pregnancy.  I am feeling so Nervous and disheartened now. Anyone experience this and it turn out to be okay? I also have had no spotting or pain. I feel fine except for what I think is normal symptoms for 5 weeks.🙏🏻🙏🏻 praying everything works out.