If somebody learns something (e.g biology is the study of life) it seems to work and make sense every time. Does that change at some point?

I've always been very type A and anxious about certain things, but more recently I've been experiencing almost compulsion-like behavior. For example, I take showers at night, and i...

I started smoking weed around two months ago and I quit around 3 weeks ago, but after smoking it for a month I started to feel depressed and didn’t like it so I stopped. After I ...