Your right Marijuanna use does complicate things even a light history. Go back yo childhood. DID you feel spacy then? Lack of sleep is a big indicator if you answered no. If this recent go to PHCP doctor and request a referral for Sleep Latency Test. If not sleep apnea, it might be Narcolepsy. Also please turn off all cell phones, laptops, tablets, TV by a certain time. Charge electronic devices in a room where you do not sleep for 7 days and see how that works. Oh anf one more thing! No wireless headphones or Bluetooths. Use wires and never answer a cellphone by putting it to your head!
Do you own an iPhone??? GET RID OF IT!!! OR buy a special case that reduces radiation. iPhones Apple is the worst!!!
Ummm, people with undisguised ADD or ADHD tend to self medicate. Ever checked out the symptoms of ADD? You might be interested in this link.
http://www.helpguide.org/articles/add-adhd/adult-adhd-attention-deficit-disorder.htm
No one seems to believe me, but I got this very same brain problem from smoking marijuana years ago. I was not even using heavily... Everyone says this is a perfectly safe drug, but I know differently from personal experience. Feeling like this has really taken a lot of the joy out of my life. I've lived with this problem a long time now with no relief.
You should tell a doctor about this. It could be a lot of things, like the side-effect of medicine, sleep apnea, and I'm not sure what else. I tend to be a bit foggy and poor memory and I have ADHD and some form of sleep apnea that I'm still under study about.
Does it sound at all like derealization?