first ultrasound not sure how far along

Hey guys! We had our first appt to confirm pregnancy after an early MC last month. I didn't have a cycle in between so our doctor had my blood drawn and did a transvaginal u/s to see if there's something. We saw a tiny gestational sac and she said it's looking pretty good but wanted to see my hcg levels to confirm. This was a little relief for me because last month when I had a MC there was nothing to be seen not even a sac. My hcg level came back to 2700 and then doubled to 5000. We are hoping we'd see more on our next appointment this weekend!!