Yes, certainly, but it could be other things that also should be ruled out. Brain chemistry, endocrine system health, essential nutrients and electrolytes, a disease hitherto undetected, pulmonary health. I only add this for an attempt at completeness, not to suggest that you are necessarily barking up the wrong tree with respect to apnea; get the apnea checked out! Sleep apnea, if bad enough, has its hosts falling asleep at longer traffic lights!