I have been taking Lybrel for 3 months and it seems that I am experiencing a wide array of side effects. Prior to taking Lybrel, I had been taking Ortho-Tri Lo for 4 months. My reason for taking B.C. pills is because my periods had been getting increasingly worse over the past year (my doc thinks I have endometriosis), which essentially made life unbearable for 1 week every month. Going to work was even a challenge during period week. Unfortunatley, I became very moody on the Ortho-Tri pill, as my body seemed to react to each dosage change that happens weekly. Lybrel has brought on different issues: 1) I had spotting for 4 weeks straight during the 2nd month of taking it. 2) After the 4 weeks of spotting, I had an actual 6 day period (luckily the last 3 weeks have been fine). 3) I started exercising vigorously and limiting calories 7 weeks ago and I have only lost 1 pound. A year ago I did the same regimen and lost 20 lbs. Anyone out there having the same experience?