sativa takes a looooong time and isn't really the best for a noob.
Did you check to see if you have a light leak? If light gets in you growroom, when flowering, it will stunt the growth, an perhpaps cause it to go hermie, but to answer your question, if you have pestils happening, then you should start to see buds forming in another week and a half to 2 weeks, keep strong bro it's all a waiting game.
just keep doing what you're doing and check your grow room when the lights are off, to make sure no light leaks.
happy growing bro