Annoyed 16 days late

So I'm getting a little confused and frustrated. I have taken a few tests and they are negative one that looked faint when used with a negative filter. I took some ovulation strips today to see if maybe I just missed my period and to see if I'm close to ovulation and while I know its negative it still seems to be darker than it should be. Could this be a sign of pregnancy or just a slipped period. My last period was december 12-17. I had a high ovulation test on jan 2nd my period was estimated to start on jan 17th but obviously never came. Here are the ovulation tests taken today. I plan on making an appointment but just curious to see if anyone else has experienced this or has any insight.