Hey
Sounds rough, I can relate to a lot of those feelings.I too had similar feelings after smoking pot and doing acid a lot. I didn't stop the drugs right away but slowed down then stopped. I felt like I was going crazy - but always thought, but crazy people don't know they are crazy!
I went to the doctors eventually and she told me I was experiencing paranoid episodes. I didn't want to believe it so I refused the meds. Life was pretty ****** for a couple years, but for me, most of those thoughts did go away. however, I was still soooo depressed and anxious all the time! I got onto meds for depressions and anxiety and they honestly changed my life. I could function, I didn't feel that disconnectedness and numbness. I know you said you don't want to be labelled as having any mental disorders and I don't want to do that but I do think that seeeing a doctor and being honest and open minded could really help. There is such a stigma about mental health and medication but if it helps why not right.
Hope I am not being insensitive but I really felt i could relate, so I felt compelled to tell you what helped me.