I feel for you , You have made the best step forward by making an appointment with the doctors, get the one you can feel comfortable with and can talk about anything ,
I have just got over a 7 week period of work related stress, I knew that I was in trouble all I could see were negatives , not sleeping and shaking in side , a sort of tremble , it was horrible, I too thought that diazapam would be prescribed , it was not he put me on citalopram , may be similar i am not sure , after 10 days or so i was feeling a lot better and felt as if I was seeing things more positive, even though my employer was plotting my down fall!!
anyway I feel much better now and I hope that you too can see the outlook has positive signs, treat it as a break or some me time whilst you re direct your life , somewhere you want to be, Christmas is a seasonal oppurtunity for some kind of work so keep your eyes peeled, Look on the bright side, whilst being interviewed, smile and be yourself ,Best of luck , you will be ok , just have a quite word with your mum and your boyfriend , they will suport you if you explain what you are feeling , stick with it and keep your chin up :-)