Your buds will get a lot bigger over the next few weeks don't worry. Your pistils look fine, but they may be drying a little prematurely. You are at the point where she will be drinking a LOT of water. I currently have a plant in about the same stage and she just drank 2 gallons in one day!! This was in DWC, but the thirst is real. Keep checking the dryness of your soil to see if you need to water more. They gorge for 1-3 weeks, then start drinking less again.