Firstly, Media Studies is included on both LSE and Cambridge's lists of subjects that provide "a less effective preparation" for their courses. I don't wish to suggest that other universities necessarily adopt the same viewpoint but I imagine that a fair few of the top ones perhaps prefer other subjects.
However, I believe that your other three subjects are considered academic so, as a fourth subject, Media Studies is fine. At the end of the day, you want to take subjects you enjoy and that you'll do well in. If you're applying for a very competitive course (i.e. Medicine), you may wish to consider taking a more traditional subject though.
Secondly, if you want to study Medicine, I'm fairly certain that you need to be taking Chemistry. I'm sure someone with more knowledge on this topic will comment further.
Furthermore, you cannot study Medicine as an undergraduate in the United States.
I also don't know how universities feel about people taking both English Literature and English Language. My school doesn't offer English Language (rather English Literature and a combined option) so I'm not too clued up on the ins and outs here.