I see HI after SP has set in, but alot of times HI presents itself immediately after SP has started. For staying calm, you should try getting into a particular mindset. Basically, act as if you are a veteran LDer. Tell yourself that you will easily enter this lucid dream with no problem. Stay calm and just allow the vibrations and sounds to rush over your body. Good luck to you in your future attempts! Congrats on your success so far.