Since you have the book, I am not sure what your question is? Start LRT now - sounds like a match to me timing wise. Remember it is never too late to stop a D until you sign the papers. A lot can happen before then. Making significant changes now that you can maintain will help you get through this - it wil either work or not.But you will be ok.
Did you read about the stages of a M and have you identified what stage this is? Just to give you a place on the M map and see where you are and why this is happening now. Hopefully will give you some understanding.
What are your questions? Did you read all of this post? Mr L has down well to follow steps and sees some improvement while taking breaks to "freak out here where it doesn't matter".
Check out DB forum and peicing forum just to get an idea of how it works in live time. This is the place to journal, vent, practice saying things and get opinion, advise and support. Just ask for what you need.