ovulation confusion (opinions please)

Melissa
Hi, my name is Melissa. My husband and I have been ttc for two years with no success. I recently decided to try out ovulation test strips, but I'm a bit confused on how to read them. I know the line should be as dark as, or darker than the control line, but most of them seem as dark as the control (one darker). Maybe I'm just going crazy, what do you think? Thank you!