Need help with identifying what this isand what to do

Hello there! Yes most autos will show some pre - flowers after week 3 but doesn't necessarily mean it's going into the flowering stage. Auto flower genetics vary when a plant will start flowering and when it will be done flowering. It all depends on what genetics your running. You may just have some genetics that are build for later flower growth. I am growing a purple punch auto from Barney's farm that is in week 4 of veg with no signs of pre-flowers. I also have a GG auto that I'm not documenting that is showing pre-flowers but it's still not in that full flowering stage quite yet. So my tip would to just be patient. If your still not seeing signs of dense pre-flower clusters with in a couple of weeks I would go ahead and start treating it like a photoperiod by giving it 12 hours of uninterrupted darkness at night time. All and all she looks healthy and she's getting big! Not to mention the beautiful view she gets! Would be ideal for her to be getting the full sun to help dense up the flowers that will soon be here. But this window spot should do considering your in a very sunny area ☺️