Yes, you are still in wd.
Yes, things will get better.
If you haven't read this, best to do so:
https://taper.community/resources/blog/mirtazapine-withdrawal-symptoms
These WD effects alone are enough to trouble you, if you feel you still have psychological issues (fear, guilt, etc) it'd be helpful to address them soon. If not, be comforted that as time passes, you'll improve decently.
Like me, I hope youve learned the lesson of looking to drugs - or Drs - for sleep support. They're like buying sleep on a high interest credit card. Soon you'll pay it back big time.