Welcome to HCM
Its very good that you are determined to not to smoke pot again. Although smoking pot don't cause physical dependence but still a lot of withdrawal symptoms
are seen for long time, like easy fatiguability, stress, low mood, irritability, change in sleep pattern, crying spells etc. So best thing to avoid these symptoms is you can take OTC non opioid analgesic
drugs like Ibuprofen
for muscle fatigue
. Have tea or coffee at least 2-3 times a day. The symptoms will go in some time.
But the main problem is that you have become dependent on Xanex. Try to quit this drug also, as although it is a good anti anxiety drug still it has very high abuse potential. Best you can try is to taper the drug slowly over a month. Start with slight decrease in dose and bring the dose to nil at the end of month. Decrease the dose by 20% each week. If not possible then visit a good psychiatrist