Not getting darker??

T • Pregnant w 🌈• due 6/21/21

So my period was due 8/11.

I had a vfflll last that day, and then yesterday another faint line but not as dark (I was expecting it to be darker!) however I took Tuesday’s at 10am (SMU) and yesterday’s at 2pm (2 hour hold prior)

Could this maybe affected the results?? Still no period, ovulation date not confirmed.