oh man please, please believe me when i tell you i understand and i have been through what you are going through. the brain fog, feeling like your not real or nothing else is real, the weird symptoms that make you feel like your about to die or go through something really horrible ( in my case a stroke or heart attak), numb feeling in head, arms, legs, chest, face thinking you are having a stroke. not being able to sleep, hacing a very fast pulse, or low pulse, thinking of impending doom or horrific thoughts. its horrible and horrifying i know. your only problem though is that your using drugs and your drinking. elimnate them and youll start to feel a little better. im not saying right away because it took me a very long time to get back to my regular self when i stopped doing drugs.( this was withought medication which i now use and i strongly recommend you do also). talking with a therapist or psychologist really helps too. and when i say talk i mean it. tell him/her everything. from your childhoood to now. about every problem in your life and everything is going on or has happened. i got out of it because i said enough was enough. so can you man. any more questions or if u just want to talk feel free to message me through here or email just dont flood it with spam lol.
get bettter