Sensitive to loud sounds, strong smells and crowds

Hi all, I've noticed that I'm sensitive to loud sounds (when my dad or mom is using the blender in the kitchen for instance), strong smells (the smell of masalas and hot oil used when cooking) and crowds (if I'm in a mall, crowded streets etc.) and I feel like just disappearing. I also noticed I don't have trouble with these things when I'm doing them like when I'm working on music, cooking something for myself or when I'm super focused at getting something from the mall or on a crowded shopping street. I'm not sure why. Any and all advice is appreciated.