Less common disorders that cause vertigo include multiple sclerosis, seizures, infections, fractures at the base of the skull, head injuries, and tumors growing in or near the base of the brain.
Vertigo can sometimes be part of a migraine attack
and occasionally occur without the headache.
Since I cannot examine you and know other related conditions you may be having, nor is a detailed history possible on net, I have listed the various possibilities that should be looked into.