Can you delete an ovulation?

Sara • Born 1981. TTC since July 2014. 6 failed IUI, 3 IVF retrievals, first IVF transfer succeeded! Baby boy due March 30, 2019.
I need to remove an ovulation from my Glow bbt chart. I didn't ovulate this month. I had a bbt spike but later realized it was because I got sick (spiked a day before I had symptoms). Never had a positive OPK, didn't have my normal pre-ovulation dip in bbt, the "ovulation" was late, my bbt started going down as soon as it spiked, and my period came 9 days post "ovulation" causing a really short cycle. I know I didn't ovulate and want it off my chart so I can keep record that I didn't ovulate this month.