Test Progression?

Does it look like the tests below are getting any darker? The first was taken around 12 DPO, 2nd 13,and 3rd 14. I feel like I see a difference between 12 & 14 but scared it should be darker. I have no one to talk about this with as my husband is out of town and am driving myself crazy 😖 with my first son the test was darker at 14 DPO .