Ok i don't really know the lyrics because I am at work when I hear the song in the store, but this is what i got (But they could be slightly wrong)
"Got lost (From finding?) you"
"these lyrics are not directly after one another.
"And its killing me"
"Can't take it anymore"

Ok I am guessing its a new song cause I never heard it in the store before. It is a woman singing and the song sounds like a bat for lashes song or kate bush. Its tranquil and mellow, but has strings and drums too , but the main instrument is a harp or a harpsichord.

Hope this helps!
I have trackID on my phone but I have no credit lol