Music Banter - Please help me find this British 2014 song!!

Hiya, sorry that my description is going to be so vague but here goes. It would make my week if you could help me with this.
Basically, back in July 2014, I was in Topshop in the Trafford Centre, Manchester, UK. I heard this song sung by a British girl. I seem to remember it had quite an accoustic-y, indie feel, perhaps with guitar and vocals and not much else, but this may not be entirely accurate. The lyrics were along the lines of stressing out about my GCSEs. Vague, I know. It was a song about a British girl's love and life. I'm pretty sure it came out in 2014. It isn't 1997, passing in the corridor by Martha although I seem to remember it is a similar vibe to this song
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Any ideas? Thanks!!