Science or Arts degree?

I've always been very unsure about what I want to study at university, as shown by the divide in my a level subjects (Biology, Chemistry, History and English lit). I love both History and science/Medicine and so am really undecided. I have the ability to do both due to my GCSE grades and I am predicted A/A* at A level, but my biggest concern is whether I will be able to find a job easily after university if I do history. If anyone has any advice it would be greatly appreciated.