What Causes Severe Headache And Slurred Speech After Having Chiropractor?

YES MY WIFE SOME 8 YRS AGO SEEN A CHIROPRACTOR HE PUT HER ON A TABLE THAT TWISTED HER BODY IN DIFFERENT DIRRECTION EVER SINCE THEN AND THE DAY IT HAPPENED AT THE OFFICE SHE GETS SEVERE HEADACHES THAT WILL COME ON SUDDENLY FOLLOWED BY SLURRED SPEECH AND HER RIGHT EYE WILL CLOSE SOMETIMES THE SPELLS LAST FOR HRS SOMETIMES LESS WE ARE CONVINCED ITS A PINCHED NERVE BUT DOCTORS WILL NOT LOOK FOR SOMETHING THIS SIMPLE THEY LOOK FOR BELLS PALSY OR ANYTHING ELSE WHICH WAS FOUND TO BE RULED OUT WITH A ENORNOUS COST ANY SUGGESTIONS