Excited

Y’all I am trying to have a baby but my body never knows when I am gunna start my period. My cycles are off so I don’t know when I’m ovulating I honestly didn’t trust this calculator. Is there any chance of me conceiving even though my cycles are off!! I don’t even know if I ovulate because I have been trying for 6 months and nothing one time I thought I was pregnant because I was one month late and then my period hit me very very hard. Anybody else going through this