Greened out awhile ago, still feel weird?

I greened out December 6th, and i still am feeling a little off. Its definitely gotten better but still a bit of a weird feeling. I still have these thoughts in the back of my head that im in a dream and not real and it scares the shit out of me. Im scared ive developed something and that this wont go away. I was told it shouldve been gone in a week or two but its been about a month and im scared.