Jillian,
If you know the name of the collection agency holding your accounts, you can send them debt validation letters to get the itemized details of your account. This way you can understand if the amount claimed is correct or not, if the agency has the legal rights to collect the debt and so on. If you find any wrong information in the validation, you have the right to dispute it as well. Read the article below to know more about debt validation-
http://www.debtconsolidationcare.com/validation.html
You can find the contact information of the collection agency in the BBB website.