What can cause sudden tunnel vision, extreme loss of balance, and immediately followed with vomiting? during more serious episodes, there is slurred speech. no dizziness. episodes are occurring multiple times a week, whether resting or active?

She needs to be seen by a physician.,examined, a definitive diagnosis and treatment started. Good Luck

Highly suspicious of transient ischemic attacks in the posterior vertebral-basilar circulation (perhaps PICA location). Do not delay, get attention ASAP, as if this is correct, a massive stroke is imminent. Get urgent care today, and get neurology involved now.