Lots of people recommending Canesten here. Great for many people, but please do be aware it can cause awful problems for some unlucky people eg vulvodynia and excruciating skin burning, which persists for months or even years. My gynaecologist, who has seen a number of cases, warns everyone now so they can choose whether to take it or an alternative if they haven't used it before.
The alternative he offers is called Diflucan and is a tablet. I'd never risk Canesten personally. Sounds scary and painful. I don't care how low the risk is, it's not worth it, in my opinion.
Check out all the alternatives and then make an informed choice about what's best for you. Don't let them palm you off with what they always use if you think it may not suit you.
(and yes, the nappy cream sounds weird!)