As jenn said, the morning after pill does not "kill" anything. It simply stops you from ovulating if you haven't already. If you want to "take responsibility for your actions" then getting the morning after pill would be doing just that. It is not an abortion pill if that is what you are worried about.
Also, if you aren't ready for children, then you need to stay on the pill. It is fully safe and doesn't "kill" anything. There is nothing wrong with being responsible about sex. Contrary, there is something wrong with not being responsible with sex.
But, if you are ready for children, then birth control wouldn't make much sense.
Please don't think that being on the pill is going against nature in any way. Yes, it alters things and keeps you from conceiving, but it doesn't harm your baby, alter your chances of being able to conceive at a later date, nor does it abort.
But, of course, this is all up to you. I just would hate to see you go off of the pill because you are misinformed about it, and then end up having a baby when you are not yet ready.