Blood tests...and more blood tests

I’m writing just to vent a little bit of worry and hopefully find some encouragement. I’m 6 weeks 1 day pregnant. I’ve had 2 blood draws so far. First one showed steady levels, the doctor was satisfied with the numbers but because it was so early, wanted to do another one week later to make sure everything was progressing as expected. Results of the second draw received today. HCg is really good. Progesterone is low-ish. Within normal range, but on the lower end of that range. Will have a 3rd draw on Monday. I don’t have a history of miscarriage (not that you need one to have one), but I’m just worried now bc I feel like that’s the natural reaction. Again, just kind of venting and hoping for some encouragement 💕