K.U.
I would just use common sense...no baby should be left alone with a dog for any length of time for any reason. Like you said, even the best dogs can have a "moment". Don't lay her on the floor or in any position where the dog is standing over her or higher than her. If they must be separated, so be it. It is only temporary and hopefully you will be in your new home soon enough. I would not worry about the dog "overprotecting" the baby and not letting you near her - most dogs should recognize that you are not going to harm her. You are having a nightmare that is based on some anxiety that you are feeling - it is not based in reality.
I guess the question is why the dog is a "biter" and what has been done about it up to this point...