Lately i've been feeling ok and suddenly i'll get sleepy for no reason?

Many reasons: Many reasons can lead to feeling sleepy, including poor sleep hygiene (sleeping habits), obstructive sleep apnea, diet, lack of exercise, stress, etc. Keep a log of the timing and frequency of your sleepy episodes and take the log with you to see your physician. If concerning, you may be referred to a neurology or pulmonary sleep specialist. http://www.nlm.nih.gov/medlineplus/sleepdisorders.html