HCG lines not getting darker ? ADVICE

Hi ladies. I've been testing pregnancy since Monday, 3/1 (Red) and have been getting these obvious positives, but the intensity of the lines has remained the same through today 3/3. Since yesterday 3/2 I began testing ovulation (blue) again along with it, and it is blazingggg... more than when I even thought I was ovulating.

My cycle is due tomorrow 3/4. And if no show, will do a 1st response on 3/5. The first test pictured with no line was a control dipped in spring water.