There is an old tradition / belief that you should never ask for the same thing twice under the same moon phase unless it was your intentions to perform a multiple day spell.
No one likes to be nagged, and I think this belief is a good rule to have to show reverence and respect to the gods/spirits that have aided you. Unless you used 100% your personal energy and nothing else, not one other "power" of nature, you've been assisted in your magick. You should have faith in your workings and trust in those who aided your spellwork to accomplish the goal.
The only thing necessary in magick is your mind. Words are just tools for your mind. As long as you knew what you wanted and were focused on it during your ritual, you could do a jig, spinning around, waving a ribbon in the air, and still see results.
Since I was a teenager, when I need a focus and have nothing around me, I grab a pencil, pen, stick, whatever, and begin drawing a 3in circle, and without stopping, I slowly spiral, working my instrument into the middle, while chanting in my mind or whispering while focusing on my desire. Usually the chant is a one word mantra, or one single phrase. As I get closer to the center, I begin spiralling faster and faster. When I'm done, I stop dead center and the energy is released. This is my own on the go twist to what most call a "cone of power". This has been just as effective for me as a full ritual.
I'm explaining this to show how simple magick can be. The fancy words, candles, and ingredients are all for your benefit, to set the mood and help put you into a magick orientated mindframe. So a few missed words isn't a big deal. In fact, I find it a great sign that you missed them. It means you were more focused on your willpower than the "special" words. Bravo! Some people can never get passed the formality of ritual. You should continue to depend on it less and less.
There is nothing wrong with ritual. But I feel its important to understand that the magick comes from you, not your physical actions, objects, or words.