Hmm...that's not good. I would suggest, if a pharmacy won't help - which they may not - going to see a doctor at a 24 hour drop-in type place, and explain the situation to them. Just say you need 5 days to keep you covered until you can get back to see your G.P. You could take your last box/prescription to prove you are not just shopping around doctors, if you wanted. I know some doctors are wary of that, and rightly so. But the fact remains, you are on medication and should not be forced into withdrawal in an impromptu fashion. Some professional should help you with that - it is only good practice. Just my take :-)