Regarding the change in stool caliber, it can be due to irritable bowel syndrome. However, before attributing it to that, you may want to consider a quick lower endoscopy to ensure there isn't any anatomical abnormality causing it.
Macroglossia (enlargement of the tounge) can be seen in disorders like amyloidosis and acromegaly. You may want to discuss with your physician these possibilities and possible workup.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b