OPKs twice a day?

Robyn

Hey everyone, this is my first cycle using OPKs.My question is when do YOU use them.. twice a day or once? and when did you get your surge in your cycle? at what time of day? iv been doing it once a day (6am) but i still havnt found my surge.. and there is 10 days till AF arrives as per Glow(which was correct last month) im hoping i missed it and actually ovulated. we have been BD every day or ever 2 days.