You should be able to find a new chemist and I have been given 2 weeks supply in the past, I have even got supplies from 2 different chemists in the past to double up before holidays. Have you tried the flapjacks? They may be a bit easier for you on holiday, or what about getting some of the exante bars to mix and match? Or, as Kay says, refeed, but when I did this before going to Madrid I found it really difficult to get back to 100% as I had developed the habit of eating again and picked loads and loads. Whatever you decide, good luck and I am sure it will work out fine.
Really pleased about the job, fantastic!