I was in a bit of an emotionally abusive household that just got more unbearably difficult when COVID came around because all my ways of coping--being out the house by working or going to classes--were essentially wiped away. It got to an unbearable degree recently, and I quite literally ran away in the middle of the night about a week or two ago. I completely cut off all of my family because they are literally toxic to me in every way possible.

I have two credit cards--Discover and American Airlines (this one is literally because of them, they went on trips and put the bills in my name because I got approved for the credit card).

• I just got off the phone with Discover and put some layers of security, which was just getting a new card so it'd be a new account number (last 4 digits of card # will be different). I also put a pin so that if anyone calls them, they have to verify that pin first.
• American Airlines is a little bit more difficult, it feels, to try to secure my account...when it was actually-- wow, actually, American Airlines just back on the phone, and they're thankfully closing my account for fraud!! I don't actually know if that's a good or bad thing, but on my end, it sounds like it's good because it's true that I never applied for this card. My mom and her husband went on a trip, and she applied with my info because I had a good credit score... so I got approved for it. I don't know what happens now though. I'm not trying to attack my mom or have anything happen to her, but it is nice that now I don't have this debt.

Ok, anyhow, I just don't really know what I'm supposed to do. I'm 20, so while I only learned my SSN when I was 16, she's had my entire 20 years of life to know it. She knows it probably better than her own. While I don't think she would ever use it to open anymore cards, I can't ever be 100% certain because that's why the airlines card was closed for fraud--I woke up and saw the email approving me for the credit card...I didn't apply for it, my mom did. Also, she was able to get INTO my American Airlines account last week to post a payment. She knew my SSN (and I guess whatever other info), so she was able to reset my password and log in. I know anyone might hoot and holler at someone trying to pay their debt, but I don't want her help, and this was scary for me because my new mailing address and number are on there...... she cannot find me.

I don't know what I should do. Is this enough to try to apply to get a new SSN? Do I just have to forever make everything as absolutely secure as possible even though she can bypass the first basic and supposedly "strongest" security measure which is confirming the last 4 digits of SSN? Do I just have to hope that she doesn't open credit cards in my name? What do I do?

edit: location is Georgia in the USA