Over-sensitivity in the Physical Senses and Emotions?

I've had an extreme sensitivity in all of my senses and emotions since I was young. For example, when I smell something burnt, the scent is so overwhelming I get pretty close to curling up into a ball and crying. The sound of Styrofoam rubbing against itself or something similarly high-pitched has the same effect. I also recognize & differentiate tastes well, typically like bland foods (salad without dressing, cereal) and can’t eat anything with too many different flavors or textures. As for the emotional side, I am easily overwhelmed by guilt and moved by others’ emotions. Just the thought of having someone disappointed or angry at me is enough to evoke tears. I’m also often overly aware of surroundings, so even the familiar sounds and sights in my bedroom keep me up at night. Is this a disorder of some kind, or just my personality?