History or Chemistry Extended Essay?

I'm considering doing either chemistry or international relations/politics at university, but when I chose my EE subject, I was leaning further towards the latter, so I took history. However, now I'm starting to think that I'd rather do chemistry, and there's a small chance that if I ask soon, I can change my subject and do chemistry instead of history. Even if I do eventually decide on chemistry at university, how important will my EE subject be? I can probably get a better grade in a history EE but I'm confident I could still get a good grade in chemistry, as I get 6/7 in both. Does anybody have any suggestions as to which one I should do?