New to OPK

Kelly • Married to my best friend 10.7.17, dog and cat mama 🐶🐶🐱🐱, Baby #1 due 2020!

Hi all!

So, I’m very new to OPK.. I’m actually just starting today. Today is the last day of my cycle, I’m just spotting and on day 4. I tested an OPK, and it did show two lines, one is lighter than the other which I’ve gathered to be a negative...however, my question is “is a negative going to show 2 lines, or does the 2nd line begin showing when ovulation is coming, and just gets darker as the LH becomes more prevalent?”

Thanks for any info!!