10 weeks pregnant. Feeling nervous

Hey everyone. I just needed to see if anybody is going through anything similar. So I’m currently 10+5 weeks. About the 6 week mark, I had bad nausea (no sickness), couldn’t stand the smell or anything without wanting to be sick. I also had very very sore boobs, I was sleeping every day because I felt exhausted. But for the past week, these symptoms have dramatically decreased, the nausea is almost non existent, my boobs are nowhere near as sore anymore, and the tiredness is still there but it’s manageable this time. I was wondering if this has happened to anyone else please? I had an early scan at 7 weeks, showed healthy baby and heartbeat. But I have to wait another 3 weeks until my next scan, and I’m so nervous that I’m going to go and it shows that the baby has stopped developing. I can’t seem to shake this horrible feeling. Any advice would be great. Thank you!