Girl, I have tried OPK for two mths and i gave up. The month that i strike, i did not test with OPK, I just anyhow ham dum and bd on alternate days.
If I remembered correctly, I used the opk after lunch and at abt eight. Before you test, you dun drink too much water and must hold your urine for abt a few hrs.
I think there are a few who have not graduate yet. Even though we have graduated, we still come in here and chat, so u are welcomed.