My dd (12) just ate loads of cooked chicken from an open packet in the fridge - she saw sell by date 11.10 so thought it was fine but it really stinks, it's definitely off. She's very upset, she's autistic and freaking out about being sick, worried she's going to die. Can I do anything to help her not get ill? I feel a bit panicky too - I'm normally very very careful with food and hygiene. Poor dd. Any ideas - presumably if she's going to get ill most likely tonight?