You need to pick the subjects you'll do the best in, you'll need at least AAA for medicine. Chemistry and biology are both pretty much obligatory - there are a few medical schools that will accept chemistry and another science that isn't biology but I'm always left confused at why potential medics wouldn't want to study biology anyway.
As said above, English Lit and history are both viable options provided you'll do well in them, and they're both seen as "facilitating" and traditionally more academic subjects. As far as Maths goes, if you don't really like it and can't do well in it, I'd stay away. I do not take maths at A level and there is no maths in either chemistry or biology which is challenging above GCSE level, especially if you're expecting a good grade.
So yes, provided your other stats and qualities all suit a medical degree, English Lit and/or history will be fine alongside Chemistry and Biology.