i smoke heavily for medical purposes, so when i run out, it pretty awful, but, i do catch myself heading home, thinking about watching a movie, playing guitar, blasting music etc. i get a smack of depression, and anxiety when i realize i wont be nestling in with my most favored flavor.
i dont believe its possible to build a physical tolerance, and that one becomes accustomed to a certain level in ones system. i smoke a lot, i just took one decent hit, psychologicaly, i am affected, but it want enough to fight inflammation, and other pain.
im not near as stressed as i was twenty minutes ago, but while influenced by stress, i started craving more.
i dont mind being dependent for chronic pain, but to be dependent to feel comfortable watching a film, guitar etc. is not so good.
in the past before i knew what was being inside my gutty wuts, when i took brakes, by choice or not, doing something creative, or opening a dictionary, or some educative or entertaining source when the cravings hit spread them out.
all the symptoms you described are general anxiety, caused by an external source ie. marijuana/cannabinoid depletion. taking benzos or the like is counterproductive, and far worse in the long run.
you need to distract your senses in a natural way, that will make it easier to distract your mind. if you may be smoking to self medicate,,, but if you were to hit a detox, they would most likely give you benzos, to help them, and you stay calm.
if these symptoms persisted, after a month or so, it would be much more solid ground to stand on to discover is an anxiety d/o is at play.
for me, when i feel distressed/touch of fear about being out psychologically, i make myself immerse into a topic im interested in, and after a while, i realize i forgot all about it.
be assured that all the physical symptoms you described are right off the list from G.A.D., and the best thing for fighting these symptoms, is not to fight them, see it for what it is, and distract yourself, by learning something new, going into nature, watch some intellectual stand-up, if you have a lawn go tend to it, ride the hell out of a bike, jog, lift weights, learn to make yummy chicken marsala, pm me if i started making any sense to you.
ps:
fuck a bunch of luck, you can depend on yourself for this, and gain some pride for doing so.