Please HELP asap!

Amatullah

I just started to tract ttc by using th LG strips, but I really don't understand them. I dip the strip for 30 sec and wait 5 and the lines aren't dark enough but after 10 mins it's a whole different color. Do I have to take the test at the same time all the time? Here is a pic of my chart! PLEASE HELP! The last strip I waited 5 mins and didn't see the dark line but after 10-20 mins I do. confusion