First step germination

Something similar happened to me on my first grow. Some people told me it was because of light stress - which I´m not sure of it thinking of it now - but I resolved it when someone told me to water her with Grow nutrients that are rich in Nitrogen because he had it too and that´s how he solved it, and in fact, it solved mine as well. Although it solved, the plant was already stunted and yielded a small quantity compared to my other girls in the same tent. Peace ✌️