I am 24 years old and was on yaz after I had my son. Well I started having problems with my cycle and this new doctor (since I have moved I am seeing a new dr.) switched me to Nordette to see if that helps. I have heard that it causes weight gain and I am tryin to lose weight. But also she didn't even really answer any of my questions and they would not check my hemoglobin level and she couldn't explain why my cycle was messed up or why I was dizzy, blacking out at times. She had no answers should I call my previous obgyn and ask her what I need to do or what...I am just so confuse about it all..