think of the plant as a rocket for space, it needs to thrust really hard, yet looks "slow" on the ground, as it picks up speed it's still thrusting really hard, then for the even "quicker" flower stretch that's like when the rocket is already in space no gravity holding it down. My point is, this is how plants grow, slow at first then really quickly, especially autos... when you're watching a plant grow there's going to be a fair amount of boredom lol, but if you compare your week 2 pictures, this looks right on track, keep doing what you're doing ! hope this helps 🚀