First of all, this problems of yours might be caused by too much Excitement, try calming yourself when you're in a lucid dream. Secondly, another solution I personally think that'll fix your problem is ADA(All Day Awareness). The technique is basically used to have better chances of having DILDs and having vivid dreams. ADA is about staying "Aware" all day. Here's an example: While you're walking towards school, try to feel the breeze of the wind through your face, the movements of your joints, the weight of your bag, the blinking of your eyes, the pressure below the soles of your feet, the rustling of the autumn trees, the shadows you cast upon the sidewalk, the noise produced by the cars, EVERYTHING YOUR BODY AND SURROUNDINGS MAKE.

If you're fully aware of you're body and surroundings, I bet you'll be able to control your dream body much better. Hope this helps, I f you have questions/clarifications, feel free to ask

ADA: http://www.dreamviews.com/f49/all-da...gyoshi-113253/