hey, i am 17years old, 5 5 and 127lbs. i have been having headaches, horrible mood swings, intense stomach pains in the lower abdomen area, i am loosing weight but seem to be a little bloated in my stomach area. i am not vomiting, but i do get very nauseous on and off through out the day, which has kind of stopped me from eating a lot. i have also recently found myself to be very tired for no reason. i do take concerta for my ADD and i have an IUD but have recently gotten my period which i was told was not going to happen. and i havn t had it since january. any ideas? thanks.