I do History and absolutely love it. Research what your exam board's curriculum will be, as it will be really boring if the topics don't interest you.
That being said, it is a lot effort and work, but if you are considering law, history is useful. History A level is also very facilitating and respected, especially for law.
I know many people who take both Geography and History, and are not struggling. It really isn't as bad as you think, and in fact it has probably got a far smaller workload then say, two creatives.