AWESOME!!!!!

That's a great doubling to see in the low 100s. And the progesterone looks great too!!! I hope you are breathing a big sigh of relief!
I'd just guesstimate that they won't want to do an u/s until at least another 2 weeks. I know you probably want one sooner, but TRUST ME, it's better to wait and have something to see!!!!
I speak from experience. I had nothing (not even a sac) on u/s when my beta hcg was ~1900 at 4w5d. Just imagine how bad I was freaking out - I thought I would have a repeat ectopic. 3 days later my beta was ~5800 (solid doubling time), and 3 days after that we saw a gestational sac and yolk sac in the uterus, but no fetal pole or heartbeat. That was at 5w 4d and my beta must have been >10,000 by then.
So I'm just sayin'. Waiting until 6+ weeks along is overall better for your stress level... 7-8 weeks is best, you're a lot more likely to see a heartbeat or even a little teeny embryo! Before then, NOT seeing anything isn't diagnostic anyway, since some beans are just good at hiding... anyway HTH, I just wanted to share my experience with you!!! These early days are nervewracking but everything looks GREAT for you right now!!!!!