I'm an 18 year old female and since about January I've been trying to lose weight.  But lately I've been trying extra hard to reach my goal and so far i've lost about 30 lbs.  For about the past month and don't eat much and when i do it's small, healthy things and i don't drink anything besides water and iced tea.  I work about 6-7 times a week.  Maybe two weeks ago I was having frequent bowel movements but it was always diarhea but I didn't feel sick or anything. For the past week I've been having stomach cramps and sometimes I become a little dizzy.  I rarely have bowel movements even when I feel like I need to.  When I have had a bowel movement this week very little stool comes out and when I wipe it's like yellowish brown and it has clear fluid and is sometimes foamy and stringy.  Then today it was the same but i noticed a little of what looked like blood .  It looked like just a little blood and is freaking me out.  I don't really want to have to go to the doctor if it's nothing serious.  Any ideas?