Call your credit card companies and report your lost or stolen cards
Every credit card statement you receive has the number to call to report lost or stolen cards, as well as your account number. Keep these! You can also find a phone number to call on the company's website. You may additionally want to simply cancel the accounts.
If you carry your social security card in your wallet (and you definitely should NOT do this), you will need to call the credit bureaus to place a fraud alert on your account. The Social Security Administration can replace a lost card, but they cannot prevent someone else from using your number if your card is lost.
From the Social Security Administration's website concerning what to do if your wallet is lost or stolen:
Contact the fraud units of the three major credit reporting bureaus:
To find out what to do if you believe someone may be using your card, see
To replace a lost card, see