A.M.
Hi again, A.. I HIGHLY recommend the FAM (Fertility Awareness Method) for natural birth control. Particularly since you do plan to get pregnant at some point, this method will give you hormone-free birth control which will actually make it as easy as possible for you to choose when to get pregnant. I used this method to know exactly when to conceive my first two children, and it worked amazingly well.
It is a method that will only work if you are diligent about taking your temperature every morning upon waking and before getting up. (That can be tricky with a 7 month old baby in the house). You use this information (plus several other more intimate indicators your body offers) to chart your cycle. The book, Taking Charge of Your Fertility by Toni WEschler, is an easy-to-read, easy-to-follow explanation of this method. I found it fascinating to, at the age of 30 when I read it, finally understand my cycle and my body.