lets see a picture from today of them... I am just interested in the soil, and the main stems. It has been a while, but I believe those purple stems spell trouble...
Do you know from what kind of bag your soil is from? Is it Miracle Grow, Ect... Another rule of thumb with young plants is to not provide nutrients until they are about 3 to 4 weeks old. They have food in them already from sprout, that is used until about that time. In all honesty, if it was me... I would dry the soil in your cup until the seedlings are bending over from dehydration, then water them at that time.
one thing also to worry about is Damping Out your seedlings. Damping Out means overwater caused the very base, or near the base of your stem to start to rot... then heal up as a tough piece of plant matter. Water will not be traveling up your stem any longer, and the plant will eventually die(pictured at the bottom).
So I guess if you want some help, If you haven't already watered. Hold off on watering until we can figure a solution.
~Red~