The 24-year-old, on a season-long loan from Swansea, was a regular for the Chairboys before suffering a cruciate knee ligament injury in December.
The former Aldershot playmaker has made two Swans appearances since joining in the summer of 2010 and he insists he has not thought about his long-term future while sidelined.
"It is a bit early to say really, but I haven't thought about it that much either because of everything that has been happening in the past few weeks," he told skysports.com.
"My main aim at the moment is just to concentrate on getting back fit because I'm no use to anybody if I'm not fit."
The Chairboys find themselves entrenched in the relegation zone, four points adrift, but Donnelly remains confident of avoiding the drop this season.
"I'm 100 per cent confident that Wycombe will be fine come the end of the season and there's absolutely no doubt in my mind about that," he continued.
"It is going to be a very tough and hard season, but I believe that we have the quality within the squad to keep us in League One."