BBT drop day after ovulation

Hey there- first post here. It’s my second month TTC. I’m BBT charting every morning. I am SO confused. According to Flo (and my OPK’s) I ovulated yesterday. Thismorning I logged my temperature and it’s dropped! Why would it drop the day after ovulation? I’m now worrying and overthinking that I didn’t ovulate. I was going to attach my graph but I can’t. My temperature yesterday was 36.31 and today is 36.18 Thank you for reading ❤️