I miscarried in March and am once again pregnant.

In March, I started spotting at 5 weeks 3 days. I ended up with two trips to the ER, and coordinating my own care between my primary care (who ordered hcg tests for me), and the ER. My previous gyn doesn't do any OB, so was unhelpful and I hadn't yet established care with the birth center... they couldn't get a new patient in very quickly. The miscarriage was complete at 6 weeks 6 days. I followed up afterwards with a (wonderful) midwife finally at the birth center, who said that when I got pregnant again, I should be seen much sooner than their standard 8 weeks, and now that I was a patient officially, that would be easier.

As soon as I got my positive test, I called to make an appt. They got me in for the soonest one available, which will be on Wed 3/25. I will be 5 weeks, 1 day. I now realize that the soonest I would have two hcg tests to compare I will be 5.3... the same day my miscarriage started last time. So...I called first thing this morning to see if they could at least order tests for today and Monday, so we'd have some results when I go in on Wed. Am I being unnecessarily anxious, or appropriately assertive about the health of myself and my baby? I called four hours ago and they have not called back, and the labs all close in 3 hours. Should I call and annoy them? Trust that the professionals know what they're doing? Will it even make a difference.... Is there time to do anything that will help? (such as supplementing with progesterone, or...?)

Any advice is appreciated, particularly from others who've gone through the same or similar.