So, this is my first cycle BBT charting. I also do OPK. I got a 'peak' result on my OPK on Tuesday 4/2, where my chart does have a temp drop and rise the next day, however it has been all over the place since then and today, 7 dpo, it dropped and FF advised I may not have o'd this month. Any help on reading this? Or why my temps would be up and down so much. I take the test at the same time every morning.