What day did I really ovulate?! Help!!

Anna

I take my temp every morning. I was put on a 7 days antibiotic last Tuesday, I'm already done. I usually ovulate on day 10. This month it looks like I ovulated late. By the chart, I feel like I ovulated on day 13. One app is saying

day 12 and another one has me at day 16. I feel day 16 is day too off. If someone can help me, that would be great. Thank you in advance.