To become physically numb to many things?

do alot of people sometimes feel numb, not just slighly emotionally, but even more so physically? until recently, i was always hyper-aware of my body, and i am still sometimes aware when something hurts too much-like a pulled back, but minor things don't seem to effect me lately. for instance, i used to be hyper-sensitive to the smell of bleach, but i can't really smell it any more when i use it occasionally for cleaning. i used to feel the pain in hot peppers and hot sauce (burning, eyes watering, runny nose after eating), but now hot hot spicy food causes me absolutely no pain. i've been eating spicy food for many years, but only now i become suddenly desensitized? i used to get tired often, but now i never feel tired (but i still go to sleep at a reasonable time), and i can't cry or feel the reasons to cry about things i usually cry about--the way i'm feeling my emotions has been very different in the last month too, but what i'm asking about and what i think is even weirder is my inability to register physical sensations (usually uncomfortable or painful) like the ones i mentioned above...