So I think I'm going crazy

Sara
I posted a first response pic of a positive test Monday. Was unsure whether it was leftover hormones or not as I was only 4 and a half week post d and c . Here's that pic :
I was having cramping for a week and a half prior and was getting 10 positive opk in a row . I decided to wait a few days and test again . I took this test yesterday :
Then I decided to check with the same test from Monday this morning and got this :
Which is obviously almost a negative and much lighter than the test on Monday .so I'm thinking either chemical or hormones had not gone all the way down yet . The only thing that throws me off is the blue dye test yesterday which is stil clearly positive and I thought it would be less sensitive than the first reponse . 
Any thoughts ???