The implant (as in, the one in your arm, not an IUS/IUD) has a lower dose of hormone than other contraceptives and can be removed at any time. If you don't like it, have it taken out, if it's fine then you're sorted for three years. You may as well give it a go because hormonal contraception is more effective than condoms (when used correctly, and it's pretty damn hard to use the implant incorrectly!) and surely that's a good thing?
You speak about interfering with your body's processes and such, but I bet you're willing to use painkillers, eat chocolate, and a whole bunch of other stuff which also alters your body chemistry.