I dont think dying your hair two times in two weeks is a good idea! It can damage your hair, so be careful about it. The more we dye our hair, the more sensible it gets. Trust me, it's just the second time I've dyed mine blue/green and I know sooner or later my hair is going to get really "weak" so I really dont think dying it two times in two weeks is good.
Give it a month or two, and test the hair dye before you use it. Make sure you're not allergic to it!