Hi, I had gone through your query and understand your concerns about your Mom.
From your description,I am having an impression that she is moving towards a rare complication of
hypothyroidism called Myxedema Coma.It is usually seen in untreated hypothyroid patients or those taking inadequate dose of
Levothyroxine.The typical symptoms are severe drop in body temperature, reduced lung function and breathing rate, slow heart rate,
constipation, urine retention and occasional seizures.It can progress to life threatening coma as well.This is a condition which require Emergency Treatment as it has a
mortality rate of 30%.
So I will advise you to take her to hospital at the earliest and get her seen by an
Endocrinologist or a Internal Medicine specialist.Do not get panic,as her speaking Yes or No is a good sign and it is completely treatable if she is given proper supportive treatment at the earliest.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your questions.