fillings

Health One of my fillings has dropped out of a back tooth. Actually it's been going that way for a while but over the weekend the little bits of metally grit became a torrant and now I have a bit hole in the middle of that mollar. I keep stroking my tongue over it, my mouth knows that something is wrong. I keep getting bits of food stuck in it. It's not actually painful. It's just wierd that I can go all the way into it and feel the gum(?) inside. Last time I went to the dentist, probably when I had this filling put in, I was seen straight away. This time I've an appointment for next Monday. I know it has to be done, but do I need the extra trauma of having another week to think about it?