11dpo 20 degree temp dip, has this happened to anyone else before?

Monica

Hey all, happy Friday! Temps were steadily going up each day until this morning at 11dpo. I went from 98.68 to 98.48. The only time I see a huge dip like that is when the impending Aunt Flo shows but that gradually decreases over days, not this sudden. My cycles are normal and I have been tracking with bbt and opks for a year now. Last month was my first time trying in a while. Any stories come out positive? I know people say that you’re not out till Aunt Flo shows but sometimes the numbers don’t lie. Took a test this morning and bfn.