Angela.. you can, might, and will have faint lines at times during your cycle... I have lines almost my entire cycle.. Faint one but lines.... I know when I am going to o... but ALL my signs.. and then 24 hours BEFORE I get a + OPK.. the line starts to get darker... until I get my +.... But Up until doing Clomid... YEP lines EVERYDAY.. Light-faint... but LINES non the less.
POAS ~ OPK Odyssey
Click the link above.... This lady did a day be day.... See lines.. the whole cycle..
This is what mine looks like too