expanding on what minacious has suggested:
There is a little trick called the alphabet game. It's quite simple. all you do is trace out the letters of the alphabet on her clit with your tongue. go slow, fast, hard or soft. Whatever gets her the best sensation (again, you have to pay attention to her bodylanguage). Use capital or lower case, or a combo of the 2. You can even try sounding them out with your tongue still on her clit. The wet vibrations sent over your tongue should drive her up the wall. It may take a little practise
When you find something that is starting to work, stick with it but try different angles. As i stated in a previous post. .25 inches one way or the other means the diff between OH HMM and ho hum
Just keep us updated.