Plant Wilting and Curling HELP!

My plant is around 17 days old, and is all the sudden wilting and dying. I believe it's from a result of a nutrient deffenicy. How do i fix it before there all completey parished?!
not to mention this is my first time, and yes they are all in the same pot because i was getting ready to transfer them to there seperate pots then bam! this happend. HELP

Transplant them quickly into good soil. A good safe mix is 3 parts Edna's Best potting soil, 1 part Worm castings and 1 part Perlite. Hurry before it's too late. They are also stretching, they need alot more light and may not survive without it. In addition to those issues, you need a fan blowing on them to strengthen the stems and providing the cooling needed to move the lights close to the plants.

Any chance they were getting too hot? I like to keep a thermometer up near the top of the plants. Have you fed them yet? What type of soil are you using. You should put them in their own pots for sure, like keg cups.

yeah i just switched to miracle grow potting soil, and thats the problem i tried feeding them once then this happened. so im re potting now. any say in weither they will survive?