Birth control question

I've just given birth a little more than 2 weeks ago and now I'm
starting to think about birth control options. I have been on the
pill and depo in the past and didn't do so good on it. I had anger
and anxiety problems while on them. So I'm looking for an alternative
but as silly as it sounds I don't want something that prevents a
fertilized egg from being implanted, I would prefer something that
halts ovulation. Am I asking too much? Does something exsist?

LeAnn