If you gained weight on a short tapering dose of Prednisone, will it come off with diet and exercise?

I'm 48 years old. I had sinus surgery a few weeks ago and the doctor put me on a short tapering dose of Prednisone afterward. I've taken it before in a different manner (as a 5 day Medrol Dose pack). But this time he had me take three 10mg tablets all at once first thing in the morning. When I began tapering, I got terrible withdrawal symptoms (sweats, dizziness, lethargy, weakness). When I finally got off it totally(about 12 days later), I had an increased appetite and I've probably gained 5 to 8 lbs (I'm afraid to get on the scale, but I have a roll of fat on my back that was not there before and my belly is much bigger too). I'm 5'3" and before the surgery I weighed about 137 lbs (which is slightly overweight for me).

I'm starting to get active again, which is hard because I have back problems. I'm scared that this new weight will not come off. I have been trying to eat less and eat better foods, but I don't want to do a calorie restriction diet for a few more weeks, until my body heals totally. I still don't have all my previous energy because the surgery and recovery took so much out of me (I was in a lot of pain for many days).

If you've been on Prednisone, can you please tell me -- does the weight come off with diet and exercise after you are off of it? I really hope I'm not stuck with this extra roll of fat and a fatter face. I really hate it!!!