This is very common. For me it was anyway im not trying to speak for all but for me it was in the beginning when I recall similar experiences trying to reach the lucidity. Seems like we all get extremely excited the instant we reach our lucid dream state in a struggle to keep it going. It takes patience. Instead remain calm check it out slow until you are comfortable with it then the rest is up to you.

I dont try to have the dreams just be ready when you do have them its about awareness.

Peace Out
Mark