first of all, i wanted to say that you seem like a very rational and intelligent person. i am sorry to hear about the difficulties that you are going through, and just wanted to let you know that it does get easier with time, especially after the first year of keeping your mind clean.
just a reminder, people use to cover the discomforts of life. when you are not using, those discomforts creep back from the long repressed subconsciousness. they manifest as physical pain, cravings, itchiness, that feeling like you can't stand being in your own skin.
this is all normal. there are probably thousands of things in life which you may find to be disturbing, and this also is quite normal. we all experience frustration, and pain, and yes physiologically speaking, for the first few years you will continue to experience such sensations at a hightened level.
keep in mind that the problem is not the substance itself, but the fact that we never successfully learned to cope with existence itself. we *must* find alternate ways of dealing with frustration, and pain, and discomfort other than choosing to live in self delusion.
before you can find relief, you must face the things that trouble you the most, and decidedly and courageously resolve them, one by one. it may take years, but you will find that with every resentment or fear that you are able to identify and uproot out of your being, the pain and negativity of physical existance will lessen, and the ability to enjoy those rare and simple moments will return to you.
if you watch a child, they are born innocent, and become jaded with years. they become angry, violent, materialistic.
we must find a way to return to our natural and peaceful state.
believe in and surround yourself in that which inspires you most, be it love, music, nature, friends.
life is a precious gift once we overcome the years of programming that pulls us down. face yourself, and become that which you always dreamed of. it is within your reach bro.
you are not alone.