HELP LADIES, WHAT'S GOING ON??

MommA BeaR OF BoyS
I don't get why my tests are not getting any darker?!?!? Last MP was 5/25, started ttc 6/19 no AF in June. Don't know when I ovulated. I see alot of ladies posing pics of their tests one day to the next and they are light to dark lines.. I don't wanna set a Dr appt to be told a negative. 1st pic is from July 3rd & 2nd pic is July 5th today..