I do not recommend pills. It will screw up your PMS. Next time when you want to have baby, it will be hard even after you stop taking the pills. There are also a lot of side effects that comes with pills.

I highly recommend external implant. Google for something called Nexplanon (improved version of Implanon). This implany is like a size of rice and is inserted into your arm. It has an efficacy period of 3 years in birth control. You can remove it anytime you want if you are having side effects from it or if you want to have a child. I don't know how much it is but it shouldn't be expensive.