I had this problem as well with a 1.5 week old plant. the leaves were badly twisted. So i gave it a feeding, which should have been very small but.........Needless to say some extensive nute burn. I transplanted to a DWC system and all growth after wards all growth was normal even though the nutes burned it, i think the lighter nutes in the dwc held. I would say its lights to close but you have no pics, how far away are they?
also this could be a Nute deff., and the plant need a LIGHT feeding, which would mean the soil u are using may not have enough nutrients to support a seedling which is clear sign of cheap soil or a nute hungry or a delicate strain of herb