Hi,
Welcome to health care magic,
Severe diarrhea (
watery stools) since 10 days could be because of drug induced or infective,(
gastroenteritis) but it should be treated promptly before patient go in
hypovolemic shock (
tachycardia,
hypotension,rapid breathing, giddiness, fever etc).
Your MS and type-ii diabetes would not have much role or will get affected by the diarrhea most probably.
You must undergo routine blood investigations and electorlytes,liver and kidney function tests,urinalysis and stool for blood,abdominal ultrasound to detect the underlying cause.
Therefore,you should be given injectable antibiotics with fluid and electrolyte replacement therapy.
You can take immodium but first the underlying cause should be detected,so that we can plan further management.
I don't think so you should wait for more time,consult your family physician by visiting ER.
Thanks and regards,