Well, I’m 14 and my period was started two years ago. My mom never talked to me about it. I have an older sister so I knew a little about it all. Also, I know that it is obvious that I bleed cramp and bloat and I’m moody put in a tampon and take Midol and all is good. What is happening in my body during a menstrual cycle? please tell me all the developements during a menstrual cycle. Only women can comment. Please help me.