Should know better

I decided to look at a dress that I have had cut out for ages to sew for Emily.  Never really done much dressmaking before and think I will have to admit defeat, I can't really follow the instructions and I did some of the cutting wrong.  It has made me feel very shaky, sick and dizzy, not to mention stupid and disappointed.  Only half an hour now until Emily comes home from playing at friends so I could do with feeling better than this :(