 [ Symptoms ] im 18 and my periods are usually normal but for the past two months i havent had a period is it normally  i also only weigh 80pounds [ Disease ] it is normal from a woman is period not to be absolutely monthlyregular but i would have no idea if this would be considered normal for you since i do not know anything about you or your medical history i would suggest that you see a gynecologist to make sure that everything is okay