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Help me understand my chart and DPO Plz 😑

Nicole • Wed, Jan 31

I have on FF my info. I swear I O’ed on Cd 24 MAYBE cd 25. The temp dipped two days after first +OPK and my symptoms were there and temp rose day after that. I don’t understand why FF has me Oing on CD 27? My fertility specialist told me (not scientifically proven) to BD the day after first positive OPK and EWCM for best chance of a boy, so I did. Now I’m worried I messed up and missed my day!