First up, well done on the lucid dreams.

Gaining lucidity can be a humbling feeling indeed, though it need not be. I find upon gaining lucidity that it helps to take some time out and assess the situation, remind myself that everything around me was is of my own creation and nothing can harm me because it's only a dream. With any luck, if you try that you'll be able to get past the feeling of being powerless and move on to confidently controling your dreams.