thanks for giving a nice historyn medications u r using.You r having multiple cervical n lumbar disc bulges n also u were recently diagnosed to have arnold chiari malformation
.In arnold chiari there will be obstuction to the flow of cerebrospinal fluid
from brain to spine due tonsillar descent causing a bloclk at the level of foramen magnum n many atimes it is associated with hydrocephalus
which may give rise to pain(headache or neck pain),,weakness,numbness,loss of temperature sensation,unsteadiness,vomiting,dizziness
,fainting etc.Most of the symptoms which u have may be attributed to arnold chiari n severe neck pain
may be due to multiple cervical disc bulges.I personally feel u r using many medications of which tramadol,,morphine,oxycodone all belong to opiod medication which may lead to dependance.Pls use only one of these n that also u try to taper it slowly.Tab phenteramine should be used only for 2-3 weeks.it is nice that u stopped using it.I advise u to consult a neurosurgeon n he will tell u whether u require surgery for arnold chiari.If it is associted with hydrocephalus causing symptoms attend to neurosurgeon urgently as surgery gives good symptomatic relief.