[nvarsj]

I believe this is what's considered as a "highly sensitive person". There's some scientific evidence showing that you can identify even babies based on how they react to external stimuli. Basically your brain is hardwired to react more strongly than others - this makes social interactions with strangers quite exhausting, for example. And there is nothing you can do about it - it's just some evolutionary development that occurs in a portion of the population. I recommend looking into it more if you're interested - there is also the book Quiet by Susan Cain.