Mido has revealed the emotional turmoil that compounded the physical pain of his three-month injury lay-off.
Mido, 25, has struggled to regain full match-fitness since returning to the first-team squad - there have even been suggestions he had been carrying excess weight.
"Some injuries are really more difficult because you don't know when you're going to be back," said the £6million summer signing from Tottenham.
"It was very difficult emotionally and mentally for me.
"Now all I'm trying to do is to play well for the last 10 games of the season and have a good run in the FA Cup.
"If I can do that, I will be very happy."
Mido came through the biggest test of his match fitness in the last round of the cup against Sheffield United, playing the entire two hours (double check) of a fifth-round replay that went to extra-time.
"It was a big test for me to play two hours," he said, admitting he was "knackered" at the end of the game.
"My injury this season has been a big disappointment for me, especially the timing.
"I have missed the African (Nations) Cup and have missed an important period with the club.
"It came after I started to play well."
"Of course I'm not in top form but I'm fighting to get back in top form," Mido added.
"I'm doing everything possible on the training ground to get back in my best form. But it's not easy when you've been injured for three or four months."