Over again, literally

Annabelle wakes up in hospital thinking she's 17 and in the most perfect relationship with boyband member Harry Styles. When later realising over year had passed since then and that she was actually 18 and with someone new, how can she carry on her life with a massive chunk missing? Who does she trust to believe? Annabelle woke up with all the same feelings she had for Harry. He was the love of her life all Over Again... but will he ever love her again too?