Tnx Minusminnie - 
Lorazepam.
I'm sure that your break will be OK once you arrive and realise that you have the Valium to hand.  Because I knew how it worked for me and when to take it appropriate, I never required the extra 5mg to 'get through'.  
Will U B sending a post card ? ;-)
This evening I was talking to a depressed friend who asked if I was every worried about becoming reliant on 'valium' as I do have a tendency for obsessions, but because I've always known that it works when needed, it never crossed my mind that I would require it every day. Eventually it stopped having a soothing effect and made me feel quite 'odd' [well odder than normal] so I didn't take it again.  In fact the old meds from the 1990s: Valium, Tramadol and another that I can't remember went to the surgery to be destroyed on Friday  

].  There was a time when I believed that I would never leave the house again  

, it took a while to learn my limits and not take on too much at once.
Same with Lorazepam, when anxiety begins to take over is when I swallow it: it either enables me by easing the feelings or knocks me out.  Once I wake from a deep sleep all the anxiety has gone.