I am trying to figure out my menstrual cycle and if I have a 28 day cycle or a 30 day cycle? Here is where I am kind of confused - I got my period on May 28th and it lasted 7 days. I got my period again on June 29th and I am still on it till about the 4th or 5th. I usually have my period for a bout 7 days, no more no less. I don't get my period on the same day each month which if you ask me I don't think that is normal but it is usually around the same week that I get it each month. I have tried using helpful information to figure it out but I just don't get it. Can some one please help me? If I know how long my cycle is then it is easier for me to figure out when I am fertile and such, thanks!