Yep, that's normal; as others are saying, both the pain and the buds/pokiness will wax and wane, but overall growth is still continuing. I personally think that breast tissue has "resting" cycles where it's preparing for the next round, and I've literally woken up one morning with them poky and gone to bed with them soft and spreading. (As time went on, those resting cycles also seemed to coincide with fat depositing there, which makes sense.) I also never had the kind of pain people describe - achy occasionally, slightly sore, often really ITCHY - and I've had consistent and excellent development all the same.
Bear in mind, too, that the bigger they get, the less dramatic the growth will seem. Adding 1/10th of a cup size looks really obvious when you're starting from zero, after all, and barely noticeable building on a C cup. And so on.