My plant just turned 6 wks and I have been waiting to see the sex, but under inspection I noticed the tops are starting to look different. I see this kind of change in my other plants before the bloom. I was looking for confirmation. I thought I had another 6-8 wks of veg. Also I haven't been able to see the sex yet which I thought I would see first. Is 6 wks to early for flower stage?