How exciting about having another scan! I too was worried in the lead up to our scan we had at about 18.5weeks. I kept worrying that we would see some freakish thing up on the screen, but DH was so reassuraing and kept telling me that our baby was completely healthy and beautiful, which of course, it was when we saw him/her on the screen.
Its complately normal to be a bit anxious about it - its a mum thing! But I am sure everything will be perfect with your little one. I also had not felt any baby movement before I had the scan, but our baby was moving around and did a somersault while the scan was happening. It was the best thing ever to see our little bubba.

hopefully the next 10 days will go quick! Is your DP going to be there too/?