Thanks for the suggestions - unfortunately all of those foods apart from peanut butter make me ill, so I'll investigate the tablets. I actually slept OK last night so HURRAH!
Yes I'm trying to get rid of that voice! Today should be quite lazy as we are just going to a big craft fair at Knebworth (a stately house type thingy) which has loads of traditional and rare crafts on display. Falconry and archery also sound like fun!