How can i find out if a concussion affected me?

How do you feel?: Look for any differences in how you act and feel. Sometimes, you can't tell on your own, so ask a family member if they notice anything different. Do you have dizziness, headache, blurry vision, concentration or memory difficulties, or feel clumsy and awkward? If you do, or if you're not sure, see a doctor or clinic who deals with concussion (traumatic brain injury).