Anna offers to take her to the OB this time, and secretly, Elsa's glad. It means she doesn't have to take public transport, or walk through those doors alone.
When Anna offers, it means she doesn't have to ask.
Everyone is on edge, Elsa especially. She gets to see her baby today, for real. The lawyers haven't really gotten back to her – they're in 'discussion', whatever the hell that means, with Hans' people.
But as Anna hums along to a song on the radio, Elsa finds those worries drifting to the back of her mind.