Head malformations exist that do not involve the brain. Craniofacial disorders, for example, are the result of abnormal growth of soft tissue and bones in the face and head. Craniofacial differences can result from abnormal growth patterns of the face or skull, which involves soft tissue and bones. A craniofacial condition may include disfigurement brought about by birth defect, disease or trauma.
In order to diagnose the condition, you might want to request a CT scan or MRI for starters. I'd suggest that you see your family doctor first, and then get a referral for a specialist later, if needed. I'm sorry that you don't have insurance at the moment. You might look into state, city or county funded health care plans or systems that can help!