It sounds like to me that you have small case of anxiety and panic disorder from smoking. The first time I ever had a panic attack was off of weed and felt just like what you describe. Depersonalization is feeling as if everything is a dream or seeing things as if they are not real. etc. But what you describe sounds like what I used to feel before I had dp and just had anxiety problems. I had anxiety and panic attacks for nearly 10 years before I got dp. What helped my anxiety was meds and socializing but everyone is different and meds aren't for everyone.