ovulation strips

Hiya ladies. Was wondering if u could help Me.... Me and my husband are trying to conceive baby no 3.. Have been trying for 6 months. And I have decided this month to try some ovulation test strips...I have been testing since my period ended I'm on day 12 since my period started...Last four days it's been a faint second line which I know is negative but today there is no second line! What's this mean? Nothing? Or have I missed my ovulation? Thanks in advance xxx

with opk's.
u need to hold ure wee and not drink for 3-4 hrs. and both lines need to be dark to be positive.

if no lines are showing then the strip is a void.

hope that helps, and baby dust