Congratulations on the lucid.
I've been having that same feeling. One of being overwhelmed upon becoming lucid.
I learned to pass that, it still happens from time to time and results in a few second long lucid's every once in a while.
You may want to try a technique to enter a dream while awake. WILD, DEILD, VILD, things like that are easy to do and you enter the dream while aware and awake so you can't get all excited really fast and wake up.