my mother in law was standing and chewing at the same time. She felt weak in the legs and had to sit down with a borderline fainting spell. she recovered slightly with clammy skin. this lasted for 30 mins and had to rush to bathroom to vomit. She came back out for another 20-30 mins and had to vomit again. she complains of head pressure but no stomach pain. Did she trigger a nerve with her jaw while eating or is it something else. She shows no signs of stroke as her speech, face and extremities are all normal