10w 2d - Fluid at back of head/neck

Hey all, just come from a scan at 10 weeks 2 days. During the scan the tech pointed out that there was some fluid at the back of the head/neck. She said this can be normal at this stage but you would expect it to go by 11 weeks, otherwise it can indicate an abnormality.

Has anyone had a similar experience and turned out okay? I lost my last pregnancy at 13 weeks so this is additionally worrying news to receive at this point.