Some great advice so far.
I loved English at A-level, and it's still the part of sixth form I lopk back on most fondly. I always said if I didn't study medicine I would have studied English.
My best friend studied English, and I lived with her for three years, and I can tell you I would have HATED it. The amount of reading she had to do was insane - multiple books a week, many of which she didn't enjoy, and many many days straight in the library. She now has a masters in Old English and is applying to jobs in Waterstones.
Don't get me wrong, English is a great degree and if you want to you should do it. And medicine has a LOT of drawbacks as well. But look into the realities of both degrees seriously. Including post-grad employment rates