Basal temperature

Stazia

So when I take my temperature at 630 each morning its always between 96-97.50. However I can take my temperature before I go to bed as well and my temp is only like 97.05(tonight) how would I be able to tell when I'm ovulating other than also taking ovulation tests(which I'm doing) I've never actually tracked my cycles until now. I have two babies and an angel baby and they weren't planned at all.