No shift in BBT yet?

Kelly • Had my daughter on July 5, 2016 ☀️ and my son on October 23, 2017 🎃

Have you ever had a positive OPK and not ovulated, according to your BBT? I ovulated yesterday, but. my bbt only went up .10 degrees Celsius since then. Ive read that it should go up at least .20, and all of the example charts I looked at showed a big spike. 

This is the first time I've got a positive OPK since I'm breastfeeding, and I'm nervous that I didn't ovulate like I hoped 😞

Thanks for the advice, ladies!