You've probably spent some time reading the wiki on credit scores and such. And more than a few posts on how others have had the same experience. It'll pass and be fine in a few months.

Use www.annualcreditreport.com to review all credit accounts, and after you get the card, freeze all credit reports with Equifax, Experian, Transunion (use their free services) to prevent identity theft. You and your family members.