So confused girls.

I've been trying for a baby with my partner of 5 years now and I'm finding it a little difficult. My cycle is usually 28 days but don't realize when my ovulation day is. I've read online if its a 28 day cycle its usually around day 14 but doubt that because still getting my periods. :| how can I check and find out when this ovulation day is? Thanks. ☆☆☆