BBT be cray cray

Oh hey everyone. 
Sooo according to my chart I got a spike in my BBT three days after I got a positive opk. What's happening? Am I broken?? 
(Spoiler: I definitely am broken - hey infertility friends! 👋). 
Can I also add that this forum is all that keeps me going some days. You guys are all awesome. Thanks to all of you who share your stories.