6w5d and anxioussss, slow hcg doubling?

So, I had a chemical in August (faint positive for 4 days then “period” was a day late) followed by a new pregnancy in September that turned out to be a MMC ending in a D&C at almost 10 weeks on October 24th. Never had a cycle after and based on cervical mucus, weird cramping, and low cervix, I’m assuming I ovulated on November 30th. First positive test was Dec 9th. Knowing my history, my Dr said to call as soon as I had a positive test for hcg betas and progesterone. The receptionist said I had to schedule an appt to establish care first. So 10 days later I finally had my appt for lab work.

4w5d hcg was 1651, progesterone was 3.4 5w3d hcg was 4217 *doubling time of 88hrs

I wish I had 48 hr betas bc it would be less confusing but I couldn’t get results for 4 days and then finally they had me come in on day 5 for a repeat beta. Because of that delay, I also didn’t start on progesterone until 5w2d.

At 5w6d I had an ultrasound that showed an intrauterine pregnancy measuring “5-6weeks” and we visualized a yolk sac. I have a repeat ultrasound tomorrow at 6w6d and I’m praying to see a healthy little heartbeat. It’s so difficult knowing that at any point things could just stop. I finally felt nauseous for the first time today. I’m hoping that’s a good sign. It just is so so different being pregnant after loss. I want to be hopeful but I’m afraid to hope. I’m also worried that if I’m not hopeful, I’m manifesting things to go poorly 😵‍💫😅