That really sucks. Just keep on top of it.
Just today I thought to check my credit report. It all looks fine but there is one old credit card I thought I had canceled long ago that is still shown as active. I will close it on Monday.
I was amazed to see they have stuff on there back to 2003. It is all good but I was amazed to see stuff that old.
This is the site for a legitimate free credit report. Everyone should check their credit often.
https://www.annualcreditreport.com/index.action