I'm currently 21 and my cycles have always been long. I've never missed a period except for when I was pregnant with my now almost 3 year old daughter. My husband and I have been trying for another child but for some reason I've stopped having periods. My last regular period was in mid November 2015 and then I had a very short one at the end of April but nothing since then. What could cause this? Nothing has dramatically changed in my lifestyle. I lost my health insurance before I could get in with my gyno but I have pending insurance now so I'm hoping to be seen in a few weeks. Just wanting some input. Thank you.