I agree with knotted. Twice now in the past 2 years I have had injuries(cracked rib and then knee surgery). Each time I was worried about gaining weight, but I ended up eating the same as I normally would and I lost weight! Sure I lost some muscle, but I didn't gain any fat, if anything I lost some of that also. Your body needs you to fuel it so it can heal, it takes a lot of energy to heal those injuries! So just listen to your body and eat when it wants you to.