 [ Symptoms ] why am i not menstruating  i am 19 years old and i have not had a period in 6 months i can 100 guarantee i am not pregnant i am not overweight i do not exercise really intensely and i do not really have anything to seriously stress about i moved back in january but i have had a period since then so i do not think stress from that is the problem i have chronic constipation which may or may not be ibs could that be what is causing this i want to make sure before i go get looked at and told that is what it is [ Disease ] recurring respiratory infections and stomach infections are indicative of compromised or low immunity he is at an early age and the immunity can be improved by giving him appropriate diets that should be a blend of green vegetables fruits eggs nuts meat milk while grains legumes etc multivitamin supplements can help make him drink sufficient water and also take sufficient sleep make him play outdoors and be physically active hope this helps regards