I encourage you to counter post in the Anxiety/Panic forum. Depersonalization and Derealization and obsessive thoughts are very common anxiety symptoms.
Based on what you have written, I think the trip from the drug "triggered" these obsessive (and intrusive) thoughts. Personally, I agree that you should tell a Psychiatrist about
this but the fact that you can observe yourself thinking your thoughts is a sign imo that you are not likely Shizophrenic. There are related personality disorders though and it can only help you to be forthcoming about
what you are thinking and experiencing. You are young and have great cause to be hopeful that you will not live with this forever as you fear. The sooner you deal with it, the better. I commend you for reaching out.
I don't think any two experiences are the same but I have experienced times when it felt like "This doesn't feel real." "Is this just a movie?" I have been somewhere and felt "fight or flight" because those feelings made me so uncomfortable. You indicated that this is "terrifying." I too would feel "fear" when life feels "surreal." The bottom line is that it sounds like you are aware of this distortion and FWIW, I have the analytical personality to analyze philosophical points when they become obsessive. Have you googled something like "arguments against solipsism?" I find that my personality must sometimes explore the obsession until it takes its course. Not that much unlike exposing yourself to a phobia.
Keep posting because if nothing else, you are not alone in what you have described. The Anxiety/Panic forum will probably relate more readily so give them a shout out too.
Post Edited (kellyinCali) : 8/11/2017 4:45:15 PM (GMT-6)