"It got to the stage where all these problems added up and led to new ones. I couldn't cope with it anymore," he has said.
"My priority has been working hard; doing all I can to get fit as quick as possible.
"Over the last two weeks I've had treatments, mainly on my back, and I feel good now.
"I've got some extra fitness work to do for the next two weeks to get match fit again, and then, once I'm fit and available for selection, I've got another task on my hands - getting into the team."