It does appear, in pic 4, I see some seeds. Easiest way to know for sure is to break open a small bud and look around. Dry and smoke the rest for a test as to what's to come.......
look over every branch and node until you come across pollen pollen sacks and if you find any remove them.
if it is pollinated then i dunno what you should do :/
I see what looks like seeds but they are really soft right now at this point. my trichomes are about 20% amber as of right now. Can anyone recommend me in starting the flushing cycle right now or should I wait a little longer risking the seeds getting hard that's if they are seeds. I guess at worst i won't have to buy seeds again. But I would prefer to have some good seedless bud. I still don't see pollin sacks
BTW it is possible that your plants could have hermied and pollinated themselves however you'd see little "nanners" in the mature buds... tiny banana like objects sticking out of your buds. I don't see seeds or nanners so I'm going with swollen calyxes. 90 days and 20% amber is hurry up and flush no matter which strain and/pr phenotype it is IMHO.