Medrol 6 day pack weight gain?

I started my does pack on April 26th and I have gained 6lbs since. Idk how honestly I keep with my calories every day and also ate good. I was also told I wasn't allowed to go to the gym but I did still get in some walking. I was told my motabolisim will be a lot slower while and after taking them. I've noticed my face is fatter and also my stomach area is too. The side effects also include redistribution of body fat :(
I also just found out I have a kidney infection :( and started my new meds today, luckily weight gain isn't a side effect but being tired and weak is!

Ok my question is has anyone taken medroland had these problems? How can I boost my Matabolisim? It's been a week and I still didn't even get off one if them pounds!