Do you need a PhD to read these things??

Lauren • Married August 2014, boy mom, first 💙 born July, 2016, #2 💙 born December, 2018.
I need some help with these OPK results. I'm now on CD21 and have yet to get a test line "as dark or darker than" the control line. I though maybe the three on CD 17-18 were pretty close, then they got light again. My line today was kind of dark again, then  to confuse me even more, (warning- TMI) I got out of the shower and had a huge amount of EWCM with some blood in it. I never bleed mid cycle.... 8 months going on 9 of TTC #1.
 Anyone have any thoughts for me??  I'd greatly appreciate it.