ovilation

when do you ovulate; before or after a period? 

is everyone different as in because of irregular periods do they ovulate a different times? sorry I don't mean to sound dumb but I never know when I'm ovulating. my dr said everything is functioning like it should and my blood work is normal and producing hormones like it should lol my body had its first normal period since the depo which my dr said its getting back to normal (it being my body because I was only on it for 6 months) any info that can help