First pregnancy and feeling overwhelmed - assalamu alaikum

Assalamu alaikum, sisters. I'm 21 and just found out I'm pregnant - I tested positive at home on December 14 and the lines were pretty dark. My last period began October 30, 2025, and my cycles are irregular, usually 34–40 days. My family doctor estimated I'm about 9 weeks based on my last period, and where I live they usually don't do routine ultrasounds for low-risk pregnancies until 20 weeks (I'm considered low-risk by age and have no prior history). I've been having common early pregnancy signs: nausea when my stomach is empty, needing to pee a lot, sore and growing breasts, back aches, constant hunger, and tiredness. Because I wanted some reassurance, I paid for an ultrasound at a private clinic in my city. They didn't have the ability to do a transvaginal scan; only an abdominal one. The sonographer saw a gestational sac that measured around 6 weeks but no visible embryo. She seemed concerned that the sac was smaller than expected and said she should have seen something inside it by now. She also mentioned my uterus is tilted. She told me to come back in two weeks but warned I would probably miscarry. After I got home I read that an abdominal ultrasound needs a full bladder for better visibility - something I didn't know and I had already emptied my bladder before leaving. I tried to explain this to the sonographer when she called the next morning, but she remained firm that she should have seen something. Now I'm really anxious, panicking, and beating myself up for not waiting for the routine ultrasound with my doctor. I feel like it's doomed and that I'll lose the pregnancy. Does anyone have experience with a tilted uterus or early scans that only showed a sac and then turned out okay? Any advice on what to ask my doctor when I go in, dua suggestions, or ways to calm down would be so appreciated. JazakAllahu khayr.