I used to have anxiety/depression but not anymore. however, i feel hung over when i wake up every morning without drinking. how do i treat this?

First, you need a : diagnosis. Tell the physician who is treating your arteritis with Prednisone about the recurrence of your anxiety & your non-restorative sleep. Perhaps you've had weight gain & and now have sleep apnea, or Prednisone is increasing anxiety & disrupting sleep. Behavioral symptoms, like medical symptoms, require evaluation for their cause(s) in order to determine appropriate treatment plans.