Well, Melissa, it depends on how bad your credit history is and why you were turned down. Do you have any history of bankruptcies, foreclosures, collections, or judgements? Do you have many late pays, high credit card balances, etc? Are you sure everything on your credit report is actually yours?
Sometimes, borrowers are turned down for "bad" credit because the lender did not have the underwriting flexibility to approve the loan. With all the changes in the mortgage market, some lenders have become even more conservative than others. Sometimes, it is because the Mortgage Consultant may lack the expertise necessary to make a file work. Other times it could be because a person needs to be referred to a reputable credit repair specialist.
At this point, more information is needed to determine whether you would actually qualify for a loan depending on your specific situation.