What Do Severe Headaches Followed By Slurred Speech And Hearing Loss Indicate?

My 82 year old mother fell a couple weeks ago. She began an unusual migraine headache. Her speech is slurred and she has severe hearing loss. She also recently seen for dig stove problems which she is being treated for because of vomiting. My father is determined to be my Mother internet doctor and states he feels this is a sinus infection. He had a bad experience with a neurologist and insists she doesn t) t need to see one. I am very worried and she lives in another state.