Honestly I would not worry. Just get the three A level in the general area of humanities/social science if you want to go into journalism.
A levels really don't matter much as the first year of uni is designed to catch everyone up and get them all use to independent learning. Along with a lot of other aspects of university study such as having to undo years of harm by the GCSE and A level system which always taught do a balanced argument in essays of X and Y with you ended up with a summery rather than a real opinion on the topic.