Actually, being pregnant doesn't get her seen any faster. I have taken countless pregnant women to triage per order of the ER physician. Taking an ambulance to the ER definitely will not get you seen faster regardless of the given condition. I'm not trying to prove you or anyone wrong based on my medical training as a medic but not people don't realize that and are sadly proven wrong when they go by ambulance.
I can almost guarantee she would have gone straight to triage. She had no complaint and felt fine. None of that warrants her being placed on a backboard and immobilized.
She went to her OBGYN and was evaluated.