I have been playing World of Warcraft for a few days now and have learned the Herbalism and Alchemy skills. Every time I have looted a plant my Herbalism skill rises 1 point, until I got to level 100. I have looted at least 50 plants since I've been at level 100 including Bruiseweed, Silverthorn, Briarwood, Mageroyal, and Stranglekelp, but my level won't rise at all. What can I do to make my level continue rising?