My only suggestion is to dump the idea of trying to loose weight between now and then!!

What's wrong with a size 14?? Perfectly normal and attractive.

Buy a gorgeous outfit you like and feel good in now and look forward to wearing it, rather than fretting about loosing weight between now and then (and let's be honest, how many people do actually loose the weight they want to within a couple of montsh?)

I don't mean to sound negative, but I'm sad of hearing of women who worry about loosing a few pounds for an event, rather than looking forward to it.

Buy something gorgeous and have a WONDERFUL time. (don't forget to get some lovely underwear and new perfume ... you'll look GORGEOUS!!)