Andy, not wanting to put pressure on you in your plight, yet I have to support Bron - I've had a tooth left open for weeks before the inflammation had cleared entirely and a filling could be put in. It didn't stop me from getting about (not for weekends - I certainly wouldn't risk going on holiday with an open tooth!). The only thing is to keep the hole clear of foodstuffs (for which I carried a small pointed pair of pincers - I think ...) and get a chance to brush your teeth regularly.
Gute Besserung, und ich druecke Dir die Daumen, dass Du kommen kannst!