PredniSONE and second hand smoke

Hi I am 31, have been put on prednisone for a pinched nerve in my shoulder blade. Iv taken two pills of 10 mil. For two days. one pill a day for two days. I'm stopping now. I feel so tired weak and unable to exercise. My chest is so heavy and heart flutters. I'm a smoker so it seems worse after a cigarette. I also have a few glasses of wine a day. I'm so frightened at these feelings. My tummy is now bigger in just that short of time. I really wish I knew all this first. Can any one tell me how long before I'm normal from the short usage. Please this really sucks and very scary. Also the smoking and alcohol how does it effect this? Please