Hi Gab
Well it depends on why you have had the Prednisone and how much longer you will be on it
i would really let your Doctor know about the Puffy face as that can be from other causes or you may need to take Lower Doses as it seems fairly soon to be getting the "face" i'd really check it out,
the weight gain you can loose once you stop taking it.
i have been on Prednisone of Varying Doses for aprox 20 years and in that time have stacked on the weight .