unless it was cuased, you have nothign to worry about... looks fine.
Inspect the plant and area shown in pic#2.. looks like you may have a sac. Could be hermie. top node.
not sure if that's a preflower or a start of something.. i don't see you r plant in bloom -- you may not have an autofloer. (it can happen). change lights to 12-12 and if in 2 weeks it's got tufts of stigma (white hairs) all over.. it's a photoperiod plant.