I am a veteran diagnosed with chronic, severe PTSD and a severe sleep apnea. I have been prescribed, Hydroxyzine Pamoate for anxiety in place of my long term use of lorazepam. I am experiencing extreme nasal congestion when sleeping and unable to breathe, through my nose, either with or without my CPAP.This has never been an issue in the past, and Hydroxyzine is the only change in my med s. Is Hydoxyzine most likely the culprit here?