Question about CM and ovulation

Jessica
Ttc but I don't track BBT and haven't done opks yet so I'm assuming my O day to be in the middle of my supposed fertile window based on Glow input, Ewcm and other O symptoms. Question is, if I did O on the 5th, would it be normal to only have EWCM for a few hours that morning? Is that enough to be considered fertile? Thanks.