My Downs Syndrome Daughter Has Had Two Episodes: Sudden Onset

My downs syndrome daughter has had two episodes: sudden onset of very pale, shortness of breath...panting lower abdominal pain, fainting/collapsing weakness, eyes dilated as though she is in pain and has a hard time talking, cold and sweating. The episodes last about 5 to 10 minutes and she can answer questions but has difficulty as it seems to take her over while it is happening.