What you are describing is probably hypersensitivity. Often it is associated with ADHD, but not always. People with hypersensitivity have extreme reactions to the usual annoyances of the world. For some people it is sounds (like people chewing or the buzz of fluorescent lights). Other people are extremely sensitive to smells (perfumes, deodorants, scented candles) or light (bright sun or a too bright computer screen) or even, like you, touch. Such people can’t stand it when someone else touches them or gets too close. Certain fabrics are irritating. A tag on a shirt can distract them all day.
There are good things that come with the bad. Often people with hypersensitivity to sound, for example, become sensitive musicians. People who are emotionally hypersensitive sometimes are especially talented in working with children.
Yes, it can be treated. Sometimes it’s a matter of taking care of the little things first. If tags bother you, cut them out. If noisy jewelry bothers you, don’t wear it. If bright light bothers you, wear sunglasses.
Often, learning self-calming techniques like mindfulness or yoga can calm down a person’s nervous system so it isn’t so reactive. For issues that truly intrude on your ability to be with others (like not wanting people near you), you could benefit from some cognitive-behavioral therapy. Look for a therapist in your area with those credentials.
Your problem is real. There are solutions. I suggest that you do further research on the internet and then have a calm discussion with your mom about what you learn. You can’t just talk yourself out of this. You need to learn some strategies to manage it so that you can have the relationships you need with others.
I wish you well.