Place to prominently note/track something unusual.

What I mean is that, without fail, I have heavy, sore breasts the week before my period starts. I notice it most when I remove my bra at night, and when my cat tries to step on me. This time, weirdly, I have not had this. Of course I didn't mark it in physical symptoms, but I wish there were a way to prominently note, or flag or track such an unusual thing. At this time, my weird fact is buried in the details.