Multiple days of positive OPKs

Hi everyone!
I'm new to Glow and my husband and I just started TTC after 5 months of marriage. I took my first OPK on Saturday and the test line was super dark. Since then I've tested every day just to learn more about how the tests work and they've all been positive. The test lines have been lighter but still definitely darker than the control.
​Is that normal? Have any of you ladies gotten that before? I just want to make sure I'm using the tests correctly.
​Thanks! :)