I am mom of three girls, aged 5,7, and 9. All three of my girls had the same thing at around that age. It is perfectly normal, my mom and my pediatrician used to call it "the cocktail hour". The best thing I ever did after making sure that all of their physical needs were met was to just put them down in a fav place, the swing, the bassinet, the playmat on the floor, that kind of thing where they were close by, and go about my business. Fold laundry, clean up from dinner, etc. What ever you have to do at that time. Sometimes I played some music in the background. It is hard the first few times, but it is so much better for you both in the end. She gets to express her frustration and you don't go a little crazy! If you try it, let me know if it helps!