1 year jabs and Flu

Hi, my girl had her 1 year jabs last week. A couple of days after she's had fever which we managed to keep down but she's now got a terrible chesty cough and cold like symptoms. She's off her food and milk but managing water, seems more tired than normal and not herself. Its quite a wet cough, and she's definitely congested. Has anyone had this after the jabs? Anyones child been fluey and can give me some advice on how to help? She's not been this poorly before. Thanks.