cant tell the sex from those pics. look for small tiny white hairs coming out of the bud sites. those are called pistils and are meant to collect pollen. but dont give them any, that would suck. they look a little burned from nutes. and the soil looks a little bricky. maybe not enough perlite, but i cant tell from the pics. try to LST them and that way you can bend them down and around so you can keep them low and get many bud sites out of the one plant. why start over? i mean, start another plant, why not but if this ones a female than just flower it and get some smoke. or you can rip some clones and grow like 5-10 small plants in that area (need more lighting) and get a nice few ounces out of it. then again, this one might turn out to be a male so it might all be for nothing. good luck