Temp dropped today (still above coverline) and pinkish-red spotting this morning. I'm assuming AF is on the way. I have no idea when I O'd this cycle. If I discard my low temp on cd19, advanced puts me as Oing on cd18, FAM on cd16, research on cd15 (before my +OPK?), and OPK on cd17. If I leave the low temp in on cd19 FAM and advanced put O on cd19 (3 days after +OPK?). If this is the start of AF then that means I ovulated before my +OPK (it was darker that day but not positive until the afternoon of the next day). I guess I'll know in the next day or two. Blah.