You have applied for a child visa for another baby you've had since getting your visa? How long ago did you apply and how long did they say it would take?
If that visa is not issued you can take her on a tourist visa and inform you CO. When it is due to be granted one of you will have to take her offshore for it to be granted. But if you wait for it to be granted and you're too far gone to fly you'll then need to apply again for a child visa for baby no 2.