Gemma had to take six weeks off to recover from a chest injury.
But she got so worried about how much she'd missed that she had panic attacks when she tried to go back to Hreod Parkway School.
The illness affects about one in a 100 children.
Her mum says she asked for homework but claims the school said no.
The school sent Gemma to an education welfare officer but Sarah says they haven't taken Gemma's problem seriously enough.