The fact you've seen a nasal bone is a good sign! Don't worry about it hun you'll be fine! I felt the same way but our little human was swimming around nicely yesterday!
When I had my nt scan at 12 weeks we saw the nasal bone and the technician said that that in particular is a very good sign there's no Downs. That in 70% of Downs cases the nasal bone isn't detectable at that stage. Doesn't sound like you have anything to worry about - just enjoy getting to see the baby again!