He missed Thursday's 4-0 loss in Russia through suspension but is back in contention to face Group I's basement club San Marino on Sunday.
Speaking at a pre-match press conference, he said: "Obviously in football you have good and you have bad moments as well.
"Football is not always sunshine and rainbows, you have to stick in through the bad moments and obviously keep pushing as a team.
"We know what we have to improve on, we've had numerous conversations about it as a group and obviously with the staff as well. And it's up to us now.
"I feel like we've got everything in front of us that we need to achieve and sometimes you can have a wake-up call, which can be the best thing for you.
"In football a wake-up call can be huge for the whole squad and everybody looking forward to the games."