why is one of my leaves bent down?

So my plant is like 3 weeks old today (June 23rd) and one of the leaves looks as if it had been bent by force but i don't know what could of did that and it has been like that about 1 week or a week and a half.. is there any reason for this?

No Pic?
Could be reaching fo a light..
Damaged..
or the beginning of a fertilizer burn..

yea sorry i tried to put pics earlier but havin trouble thought it was easy to understand but maybe it is stretching the light because i have a light over it at night and put reflectors under it to give the bottom of the leaves light too and i don't think it has nut burn cause i haven\t added any and its still a green leaf just bent lol