I am a 23 year old female CFer. I have ALWAYS had trouble gaining weight, but recently (the past year) I have been putting on weight..to the point that I want to lose weight now. I know a lot about nutrition and when I started to gain more weight than I wanted to i adjusted my diet (I eat very low calorie/fat, lots of fruit/vegetables, high fiber, high water, almost no sugar besides whats naturally in fruit...) and increased my exercise. I tried cutting back on my enzymes, but had problems with gas when I did. Is there any way that it could be due to too many enzymes, could it be a warning sign of another problem such as CFRD? I also do not have regular periods, but am 100% sure I am NOT pregnant...I am not sexually active. ANY HELP would be appreciated because I have always been sooo skinny and now even the people at my clinic told me I could afford to be a little lighter..