I have real problems with teeth grinding at night, or even when I am stressed during the daytime. Is there anything I can use to stop it?

The first thing to do is sort out your stress. Obviously that may be hard, but only you can do it. Confront the cause and deal with it - with support, if need be. The second is to ask a dentist if you can be fitted with something to stop the grinding. A third option is to take sleeping tablets for a few nights, the idea being that people are put into a deeper sleep than the level at which they'd grind their teeth - not that this is always effective.

I am a fair-skinned female. Recently, a patch of skin on my forehead developed a darker pigmentation, which is quite noticeable. My doctor put me on a course of anti-fungal cream for a month, saying if it didn't work, the patch was something I would just have to live with. Is that true?

Basically, your doctor is right. It sounds as if it is a 'café-au-lait' spot, which is quite common in people with fairer skin as they age. It's not dangerous and is probably irreversible. The other possibility is that you have chloasma, a brown pigmentation of the face when skin becomes more sensitive to light. It's a known side-effect of the pill and of pregnancy, and is linked with hormone levels. If you find it distressing, ask for a referral to a nurse specialist in 'camouflage' make-up, who will show you the best way to lighten it. Use full sunblock on it when in the sun; it will darken more if you don't.