Is it normal that i'm always acting how i think i 'should' be acting?

I'm constantly putting on this act on how I think I should be acting and behaving. Not necessarily to be proper or perfect. It's more like I don't know how I would actually react or behave in certain situations. I just know how I should act and behave-- what's expected.
For example: During funerals, I don't normally feel the urge to cry, so I make myself cry. I'm sure many people do this in particular, but I think it's a clear example on what I mean.
Another recent example occurred when my dad's truck caught on fire. I was nervous, of course, but when I was asked about it, I started to act more scared than I was, believe or not. Like if I was putting on this act for their benefit. I felt like pretending to be more helpless than I was would be more fitting.
When I'm talking to people, I'm literally thinking "Okay, the correct thing to say in this situation is..." or actively adjusting my tone and/or personality, even, to fit more in certain situations and with certain people. I rarely have natural reactions and rarely express my real thoughts. I have thoughts and feelings of my own. I know that. It's just that when I'm out and facing reality, it's almost as if I don't allow myself to acknowledge them.