Thanks for your query
After any injury
to the head if you have neurological symptoms like headache, ringing in ears, blurry vision, etc, then it’s better to get radiological imaging of the head and neck done. Thus I would suggest that you go to an emergency department and get appropriate x-rays and CT scans done.
Even though helmets are protective against head injuries, sudden movements of head can cause contusions of the brain which may go unnoticed on physical examination. These contusions may not be observed on imaging studies too. Another cause of your symptoms can be some injury to the base of skull. Base of skull is the lowest part of head. Thirdly you may have some injuries of the neck.
Hope I was of help