How buds develop and make enlarge and to what point

In the first week you have an explosive grow , in the second week the top of the buds start to show some pistils, in the 3rd week is like you pics, now the plant start to fill the space between the internodes ( 4th week) and gain some size until the week 6, where u usually start flushing with regular seeds, and here the bud start to fill the entire bud with flowers covered with thricomes. I hope I have clarified your doubt, sorry for my english i’m a little bit high ✌️🏽

Be patient, your only on week 2 of flower most breeds require at the very least 6 weeks of flower and most breeds are in the 8-10 week time table for flowering

Dont panic your still in week 2 of flowering but judging from the mass of trichomes seen already you could get some decent bud out of this😋 Just give her the time she needs and you wont be dissapointed thats for sure.👍