You are experiencing a state of depersonalization
and derealization. Many individuals who smoke marijuana in the past or just once, notice the onset of symptoms which make them feel disconnected from reality. Other inducers such as stress
, panic attacks and others which were present before the use of marijuana, only begin to take hold much quicker now because of the mechanism of marijuana. There is a forum on this issue and if you do a search on google, "dp self help," you'll find a community of people who offer there advise and support.