Is this a bad thing?

Sorry the tests are in the wrong order the oldest one is from yesterday at 4 am it’s the one with the marker on it on the bottom the. The middle test is from last night around 10pm and the top is from 8 this morning. They aren’t really getting darker but they aren’t getting lighter is this a bad thing? I’ve had slight cramping and lower back pressure which I’ve heard is normal as long as there’s no bleeding which there hasn’t been. What do you think