TTC while breastfeeding

I understand that not getting my period while breastfeeding doesn't mean I can't get pregnant, however after taking ovulation tests for 3 months and watching my temp, I'm concerned I'm not ovulating and I have no clue what that means. My Dr is no help and says I need to focus on my 5 months old before trying again. It took almost a year the first time actually ttc. Any advice?