I'm in the same boat. Since I smoke, and the flu causes me to reduce my smoking, I actually breathe better in some ways. I look forward to losing a few pounds. The discomfort seems small compared to all the mental suffering I used to generate around such things. It is also a good time to practice tonglen. Finally, think that carrying suffering with grace will prevent you from accumulating bad karma, in a very concrete sense.
Meditation is a little more difficult and perhaps briefer. That's fine. It's all practice.