Tracking LH surge

I have been tracking my LH since CD 7, and I have all the test and the day. My question is should not the line be getting darker and darker the closer I get to ovulation? I don’t understand the tracking and why it isn’t getting darker. It hasn’t stopped me and my husband from having sex, and we even used pre-seed Saturday, which he hated, and we have had sex at least every other day if not everyday. I am just confused and really wanting this month to be the month.