The wrong keypad
Here we have another reason why being heavily pregnant at work is extra tiring. Not all numbered keypads will make phone calls, and your computer keyboard is not connected to your work phone.
The frustration that she must have felt as she typed and re-typed the phone number and nothing happened, I can really identify with. Anger builds and builds, and then you realize that you made a silly mistake and the anger is replaced with embarrassment. Maybe time to go home early?