For years ive been dealing with very bad depression alone, but over the past couple days my mind has left reality instead of overthinking like normal and i have been feeling completely numb but also calm at the same time. whats wrong with me? :(

Uncertain: Sometimes exhaustion can occur from anxiety, depressed mood and overthinking - feeling totally numb can replace it. It doesn't mean that you are crazy. But, please strongly consider getting help. You can start with your physician if you like or with a psychologist or a psychiatrist. But, remember, you are worth being taken care of. Things can get better.