sensitive to noise

I'm pretty sensitive to various sensory input including sound, touch, and very specific smells. I'm bothered by so many different things...trains and other heavy vehicles, having the windows rolled down in a car (so a mixture of wind and traffic sounds), things clanging together (like dishes or someone dumping a bunch of poker chips on a table), and especially competing sound sources such as practice rooms in a university music school (although multiple voices don't bother me as much for some reason). That will cause "meltdowns" for lack of a better word. Anything loud and in certain timbre will bother me and my ability to just "suck it up" will come down to what mood I'm in. If I'm in a good mood, I can deal with quite a bit. My current job and dream job include quite a bit of sensory overload (especially when it comes to sound).

I have no idea why, but the touch and sound issues have been ongoing since I was a child. I have no idea how to get help for it as it seems that I have to know everything I went through as a child to get a diagnosis or any help and I don't remember enough.