Did she take measurements of different body parts? If so your dr/carer should be able to see if everything looks ok.

As for gender - did she take some pics for you which you could show someone who might have a better idea of what they're looking at? It's not always possible to tell though at 9 weeks.

If you don't feel confident in her abilities, you could request another u/s just to check everything is progressing as it should.