Monitor Your Credit
It is the only true way to know what is going on with it. You have the ability to get a free credit report from each of the three bureaus, once annually. Further, there are many online sites which offer free monitoring to help prevent identity theft and fraud.
This allows you to look at statements, open lines of credit, and rack applications which are pending. If there is something you don’t recognize or didn’t authorize, you can report it immediately.