Is fairly heavy sensitivity normal on day three of the KöR System? Also...

I am new to the KöR System and am on day three.  I woke up day/morning one and felt the difference immediately as my teeth hurt (and already noticed slightly whiter teeth even with just one night, which was amazing.)  My gums feel as though they're on fire and my teeth are not only sensitive but generally painful overall. It is getting worse day by day. It's actually difficult to even eat.  I would feel much more comfortable if I knew this was normal or not, should I continue, and any sort of treatment. Before I started the KöR system I had zero sensitivity (only minor gum sensitivity.)  I had my custom KöR trays made and shipped out to California and shipped back a few weeks ago, they arrived days ago, and I have just finished up night three.  I am intent on finishing the entire system as I greatly enjoy seeing noticeable results despite the pain.  I do have a few other questions: (as the provided DVD is unclear,) how often may I use the desensitizing gel?  Should I use it more than once a day and continue to use it at night, past day two as recommended in the official DVD?  Why does it burn the gums?  Is there anything available, besides a simple Rx fluoride rinse, that would help soothe my gums and/or teeth?  Prescription or not, I would appreciate a recommendation.  The information so far that has been provided to me (at great cost, as KöR is not cheap - has been disappointing, and even a Google search does not provide much more information.)  Also, my dentist's office did set aside a particular thirty minute visit to try on my trays, which appeared to fit nicely.  However, they did not perform a "conditioning visit" as the extent of it was simply trying on the trays without any gel, a few verbal instructions, and I was told simply to watch the DVD.  I absolutely love my dentist and his staff, however, I'm curious as to why a trained KöR office would skip any procedure (that has been specifically at your recommendation) that would help me and condition my teeth.  I was provided with two tubes of gel for two weeks time (in the bag with a case, DVD, and pamphlet) and have nearly gone through half one of the syringes already.  I've been trying to use as little as possible but have followed the provided DVD instructions to the letter, doing exactly as you have personally advised. Which is, apply the gel to the front of the teeth, set in place, allowing a slight overflow.To quote you, as the third step - "You have a "conditioning visit" in the dental office. They try in the KoR-Seal Whitening Trays to confirm they fit and seal well. Then they fill the trays with the KoR "conditioning" gel for 20 minutes, and then re-fill the trays for another 20 minutes. You may or may not see some whitening from this procedure. The conditioning gel is designed to chemically emphasize the "oxygenation" process of the gel. This helps microscopically cleanse the microstructure of the teeth so that the at-home whitening works even better and faster." I am a willing patient, extremely eager for results but am disappointed in a few things so far - such as the sensitivity and lack of apparent proper protocol from a certified KöR provider - a provider that I trust with my life and have only had wonderful experiences with.