Any help on reviving a Fittonia

[Carisab]

Hello,

I found this wonderful tropical collection at the grocery store of some plants I was having trouble finding online. Everything was terrarium friendly and in sizes that are bigger than a 1-2 inch pot. I sectioned this piece off by splitting a small part off at the root. I have had a lot of success with splitting up sections this way, but this is my first Fittonia. It has laid over but not in a wilted or dead way. New very small leaves are still forming. It has been 6 days and it just won't stiffen up. This is my favorite and I can't find it anywhere, so I really don't want to loose it. Any suggestions? The other half of the plant is perfect still. I have pulled sections from two other plants and they are happy and healthy. It's called a red vein or red anne fittonia by exotic angel plants, and they only sell commercially.

Thanks