Hun you need a DARK line. LH is present in your urine in low doses throughout the month (DH has a lot more given they are making spermies all the time), and only peaks just before O. Therefore you should expect to see a faint line at least some of the time.
Look for a line that is equal in strength or even stronger than test line. You can also see some pics on line for comparison.

Keep testing until you either get a good strong line, or your temp increase shows that you O'd, or you get AF.

Good luck!