Just noticed these pn my g13. 3rd week of flower.
Could be just calyx, they do form in the crotches of the plant when flowering. Just watch if they start to multiple in one spot or different areas then the crotch of the limbs.
I'd just keep a close eye on the plant, however, based on the photos there's no way to determine right now...that could be a young calyx, you'll know soon enough
@W J Rucier thanks. I will
I agree with the others to wait for more development.